InLambda BDT d.o.o.
Tovarniska cesta 26
SI-5270 Ajdovscina, Slovenia
info@inlambda.com
Low-Jitter Frequency-to-Pulse
Converter FP-102E
4 Technical characteristics
Parameter
1 Description
The low-jitter frequency-to-pulse converter
produces low-rise-time pulses with user
configurable repetition rate (most notably 1 PPS).
Innovative design, resulting in high stability and
low added jitter insures stability and accuracy of
the output signal, directly correlated to the input
frequency.
2 Features
•
•
•
•
•
•
•
•
2 independent input/output channels
Up to 100 MHz sine or square wave signal
inputs
Configurable division settings for each
channel
Configurable channel-to-channel delay
Long-term stability
High output pulse power
Output pulse rise time < 2 ns
Web user interface
3 Applications
•
Clock stability comparison using
oscilloscope or a time interval counter
an
Independent
input&output
channels
Radar simulation
development
and
radar
•
Frequency-transfer links comparison
•
Low-jitter delay measurements
system
Input reference
frequency
2
4x front panel BNC-F
fin1, fin2
1 MHz – 100 MHz
(50 Ω, AC coupled)
Input voltage
Uin1, Uin2 100 mVrms- 700 mVrms
(sine wave)
150 mVrms- 700 mVrms
(square wave)
Output pulse
repetition rate
fout1, fout2 1 PPS – 400 kPPS
(repetition rate below 1 PPS also
possible)
Output pulse
duration
Tp1, Tp2
1/fin1, 1/fin2
Output pulse rise
time
Tr1, Tr2
< 2 ns @ 50 Ω (10 % - 90 %)
Output pulse
voltage LOW
UOL
< 0.2 V
Output pulse
voltage HIGH
UOH
> 4 V @ 50 Ω
Channel-tochannel delay
dt
Channel-tochannel jitter
jittch-ch
(up to 12 V on request)
Power
consumption
Size
Adjustable, 1 us minimum
* for more info see chapter 5.7.3
User interface
< 10 psRMS
Web / HTML (Static IP or
DHCP)
UAC
85 - 264 VAC (47 – 63 Hz)
PIN
6 W typ.
(VDC power supply on request)
W x L x H 165 x 220 x 51.5 [mm]
6.496 x 8.661 x 2.028 [inch]
Weight
FP14c2
CH
I/O Connector
Power supply
•
Symbol Value / Comment
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1200 g
1
FP-102E
5 Operation manual
5.1 Basics of operation
The FP-102E converts any frequency up-to 100 MHz
to any desired pulse rate. The output pulse rate fout1
or fout2 is determined from the input frequency fin1 or
fin2 and the division ratio div of the respective
channel.
f out1,2=
f in1,2
RDY
LED
“Device ready” indication
PWR
LED
“Power on” indication
IN (CH1 or CH2)
BNC-F
Frequency input (50 Ω)
OUT (CH1 or CH2) BNC-F
Pulse output (50 Ω)
LAN
RJ-45
Ethernet connector (UI)
Reset
Button
Reset to default values
Power Line
Module
div
The frequency and division parameters are set via
web based interface.
Connector 110V/220V input
Case
Fuse case
Switch
ON/OFF switch
5.3 Power on
Plug a power cord and turn the power switch to
“ON” position. The device will start a power up
sequence. Settings used at previous session will be
loaded.
Once power up sequence is complete the “RDY” LED
on the front panel will turn on. FP-102E is going to
start with normal operation.
5.4 Connecting for the first time
By default the FP-102E is configured to have a static
IP address set to 10.14.7.2/24.
Channel 2 (CH2) may also be delayed to allow
measurements
with
time-interval
counters,
regardless of their dead time.
5.2 Connectors and interfaces
To connect the FP-102E t your computer, set the IP
address of your system aso stated below:
IP address
10.14.7.1
Network mask
255.255.255.0
In case of facing any problems configuring the IP
address on your system please contact your system
administrator or see the InLambda Application note
no. A0S01 - Connecting to InLambda web based
interface via static IP address.
Once you have set your IP address correctly, you can
connect your computer to the FP-102E via ethernet
cable. Please ensure that “RDY” LED is turned on, if
not wait for a few seconds (<1 minute).
The interface may now be accessed by typing FP102E's default address (10.14.7.2) into your browser.
The web interface should be displayed by your
FP14c2
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FP-102E
browser now. If you connected the FP-102E for the
first time or you had reset it via the “reset” button
the FP-102E will load the following default
frequency and division parameters:
CH1
CH2
Input frequency
10 MHz
Division rate
10E6
Input frequency
10 MHz
Division rate
10E6
Initial CH-to-CH delay
The web interface will reload, again showing the
current configuration on the right side of the screen.
5.5 Web-based user interface layout
The web interface consists of two parts:
•
the upper part for setting the parameters
regarding the frequency and the division
ratio
•
the lower part
configurations
setting
!!! For real-time error display and calculation of the
output pulse rate Javascript needs to be enabled!
However the other features of the interface will also
work without Javascript.
When the “Send Configuration” button is clicked,
the data will be send to division stages of the
FP-102E and will instantly start to operate as it was
set up.
500 μs
for
Configuration” button.
network
The FP-102E is set via input fields on the left side of
your screen. Current configuration is shown on the
right side of the screen.
5.6 Setting up the connection
If FP-102E is to be connected to a Local Area
Network or a default address range is already used
by other network-interface card on your computer,
the IP address of FP-102E needs to be changed. This
can be done by the lower part of web interface.
If any of the web address fields are out of range, the
error warning will appear below the “Send
Configuration” button.
If you are not familiar how to set up your network,
use the FP-102E in a point-to-point configuration
with your computer as described in chapter 5.4 or
contact your system/network administrator.
If you do not remember your last network setup and
you can not connect to the FP-102E, reset the
network settings of the FP-102E as described in
chapter 5.8.
5.7 Setting the parameters
Frequency and division parameters can be set by the
upper part of the web-based user interface.
As the input parameters are entered, the output
pulse rate is calculated dynamically, moreover the
errors (if any) are shown below the “Send
FP14c2
The entered parameters are used to calculate the
output pulse rate in real time, provided that your
browser has Javascript enabled.
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FP-102E
5.7.2 Division ratio
The division ratio is set by a text input field and a
drop down menu containing multiplication factors.
1E3
x 1 000
1E6
x 1 000 000
1E9
x 1 000 000 000
Division ratio must be:
• an integer value
• greater than or equal to 2
The input frequency and the division ratio are set by
two field each, a text input field and a drop down
menu containing multiplication factors (Hertz
prefixes for the input frequency).
Please note that though input frequency and
division text input field may be a non-integer, the
multiplied value MUST be an integer.
Example:
1125 k Hz
allowed, frequency set to 1125 kHz
1.125 M Hz
allowed, frequency set to 1125 kHz
1.1251234 Hz
not allowed, configuration not sent
When the “Send Configuration” button is pressed,
the data will be send to division stages of the FP102E and will start to operate as it was set up
instantly.
The web interface will reload, again showing the
current configuration on the right side of the screen.
5.7.3 Initial Delay
The initial delay defines the delay of the first output
pulse of the CH2 in regards to the first output pulse
of the CH1. This is useful as time interval counter
typically have a certain dead time.
The delay value entered can be set in discrete values
and will be rounded to the closest value possible.
In order to induce the delay only at the beginning of
the operation so the delay value has no influence on
jitter of the CH2, the time shift between the
channels is implemented by turning the CH2 on
after a certain number of input time periods. Due to
very large input frequency range of the FP-102E, a
pre-division stage is implemented so that delay
module is always fed by approx. the same frequency.
The pre-division stage is set automatically and it
directly determines the step by which the delay may
be changed.
!!! For real-time calculation of the output pulse rate
Javascript needs to be enabled! However the other
features of the interface will also work without
Javascript.
5.7.1 Frequency
The input frequency is set by a text input field and a
drop down menu containing Hertz prefixes.
k
Kilo
x 1 000
M
Mega
x 1 000 000
Input frequency must be:
• lower than 102.4 MHz
• greater than 1 MHz
• an integer value
FP14c2
This step is most commonly 400 kHz, which
corresponds to a delay step of 2.5 μs (for example,
this includes 10 MHz and 100 MHz inputs, at all
output rates).
Please note that also some static delay of around
1 μs is always present.
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FP-102E
Example: Identical channel settings: input freq
10 MHz, div rate 10 M, output 1 PPS, both channels.
B: Delay setting: 500 μs:
Delay setup to 500 μs +/- 2.5 μs
A: Delay setting: 0 μs:
Static delay max 1μs +/- uncertainty of 2.5 μs.
??? If more information about the initial delay is
needed, please contact the InLambda team at
info@inlambda.com .
5.7.4 Input errors
When entered parameters are out of range, the error
messages
will
appear
below
the
“Send
Configuration” button in your web interface.
Following table displays the list of errors:
ERROR! CH X input frequency must be a number!
ERROR! CH X input frequency too high! (max = 102 MHz)!
Contents
1 Description...........................................................................1
2 Features.................................................................................1
3 Applications.........................................................................1
4 Technical characteristics..................................................2
5 Operation manual..............................................................2
5.1 Basics of operation..............................................2
5.2 Connectors and interfaces................................2
5.3 Power on.................................................................3
5.4 Connecting for the first time...........................3
5.5 Web-based user interface layout...................3
5.6 Setting up the connection................................4
5.7 Setting the parameters......................................4
5.7.1 Frequency......................................................4
5.7.2 Division ratio................................................5
5.7.3 Initial Delay...................................................5
5.7.4 Input errors...................................................5
5.8 Reset to default values.......................................5
ERROR! CH X division ratio too low! (min = 2)!
ERROR! CH X output frequency too high! (max = 400 kPPS)!
ERROR! CH X division ratio must be an integer!
!!! For real-time error display Javascript needs to be
enabled! However the other features of the interface
will also work without Javascript.
In case that an error message is displayed and the
“Send Configuration” button is pressed anyway or if
a message is not displayed due to blocked
Javascript, the configuration will not be send. The
interface will display a notification “configuration
not sent”.
5.8 Reset to default values
1. Press and hold the “reset” button.
2. When “RDY” LED on the front panel starts
blinking you may release the “reset” button.
3. The “RDY” LED will turn off. System will
restart.
4. After a few seconds (<1min) the system will
be restarted and all values will be loaded
(default values in chapter 5.4). This will be
indicated by turning on the “RDY” LED.
The FP-102E may now be configured as described in
chapters 5.4, 5.6, 5.7.
FP14c2
_____________________________________________________
Do you have specific needs for electronic equipment?
Our team of experts has many years of experience in
designing in fields of microwave, RF, fiber-optics, lowjitter/low-noise electronics and embedded systems.
Send us an e-mail (info@inlambda.com) or visit
www.inlambda.com .
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