QDLL
4 Channel Programmable Delay Line 250 … 4000 MHz
Features
- wideband
- four independent RF channels
- web capability
- cascadable
- synchronous operation
Applications
- antenna Beamforming
- radio Monitoring
- direction Finding
Overview
Synchronous Operation
QDLL is a 4-channel programmable step delay line
suitable for the frequency range from 250 MHz up
to 4000 MHz in 50 Ohms technology. Each
channel has a delay range from 0 ps up to 1700 ps
adjustable in 5 ps steps. QDLL is the cost-efficient
solution for automated test systems. It offers the
remote control interfaces USB, LAN and an
optional IEEE488 interface for control via ASCII
strings. Additionally, QDLL can be operated
manually via MMI on the front panel and a web
interface.
Like many other products of Becker
Nachrichtentechnik GmbH (BNT), QDLL offers a
TRIGGER IO port. This Interface provides a
precise trigger pulse which complies with the
physical execution of the applied switching
command. On the other hand, external pulses can
be applied to this port in order to trigger the
execution of queued switching commands.
Therefore it is possible to link multiple devices to a
synchronous switching compound.
Multi-Channel Capability
Web Capability
QDLL is equipped with four independent channels.
All channels offer ~90 dB isola-tion over the full
frequency range.
A special feature of QDLL is the control via web
interface. This allows location-independent
operation of the device regardless of the user’s
operating system.
Cascadable
The high isolation allows the cascading of the
channels. Up to all four paths can be cascaded to
achieve an even greater delay range of up to 6800
ps, adjustable in 5 ps steps.
Highest Accuracy
QDLL achieves a delay accuracy of ~2 ps over all
cellular bands like GSM, UMTS or LTE.
Becker Nachrichtentechnik GmbH ■ Kapellenweg 3 ■ 53567 Asbach - Germany ■ www.becker-hftechnik.de
Quality made in Germany
Subject to change in specification and design without notice.
preliminary version 1.20 - August 2015
RoHS compliant in accordance
with EU Directive 2011/65/EU
QDLL
RF Specifications
Parameter
impedance
low frequency
high frequency
number of inputs
connector type
input return loss
input return loss
input return loss
number of outputs
connector type
power
1dB compression
insertion loss
Symbol
Zin / Zout
fmin
fmax
nin
Min.
Typ.
50
100
4000
5000
4
N female
-15
-20
-12
4
N female
S11
S11
S11
nout
Pin
P1dB
S21
S21
S21
+29
-7.5
-9
-14
0
0
delay setting range
step size (LSB)
accuracy
RF commands
processing rate
Max.
Unit
Ohm
MHz
MHz
Condition
-10
-15
-9
dB
dB
dB
250 MHz  f  700 MHz
700 MHz < f  3000 MHz
f  3000 MHz
+32
dBm
dBm
dB
dB
dB
ps
ps
ps
ns
no damage, any RF port
any RF port
f < 1800 MHz
1800 MHz  f < 2800 MHz
2800 MHz  f < 4000 MHz
single channel
four channels cascaded
based on phase delay
measurements; 0.8 - 2.8 GHz
single channel; 0.8 - 2.8 GHz
setting a single channel in
MASTER or OUT mode without
additional system load (e.g.
web interface)
between delay steps
Unit
Condition
250
31
-6.5
-8
-12
1700
6800
5.083
2
500
*
switching speed
6
60
ps
cmd/s
Note 1: for 2 n *LSB
TRIGGER IO Specifications
Parameter
connector type
function type
Symbol
Min.
Typ.
Max.
BNC female
open collector, wired
AND
low state = BUSY
2.0
5.0
5.5
-0.5
0.0
1.2
50
1
2
0.1
0.5
60
1
10
logic high level
logic low level
pulse width
rise time
sinking current
passive pull up
active pull up
UH
UL
Thigh
TR
IS
drivable capacitance
load capacitance
trigger offset*
CD
tO
-500
110
1
+0
trigger offset*
tO
+10
+60
2
2
+200
positive edge = trigger
mode “SLAVE”
V
V
µs
µs
mA
kΩ
mA
nF
pF
ns
ns
only in mode “MASTER” & “OUT”,
bus acceleration @ U ≥ 0.78V
mode “SLAVE”
50% trigger signal to 50% RFswitching (trigger mode “OUT”)
50% trigger signal to 50% RFswitching (trigger mode
“MASTER” or “SLAVE”)
Note 1: capacitive load < 100 pF
Note 2: capacitive load ≤ 2 nF
Becker Nachrichtentechnik GmbH ■ Kapellenweg 3 ■ 53567 Asbach - Germany ■ www.becker-hftechnik.de
Quality made in Germany
Subject to change in specification and design without notice.
preliminary version 1.20 - August 2015
RoHS compliant in accordance
with EU Directive 2011/65/EU
QDLL
Common Specifications
Parameter
supply voltage
power consumption
dimensions
weight
operating temp. range
storage temp. range
EMC
Symbol
UAC
P
LxWxH
m
To
Ts
Min.
90
Typ.
Max.
230
260
9
approx. 210 x 482 x 44
2800
+5
+40
-40
+70
Unit
V
VA
mm
g
°C
°C
Condition
in line with EN55011 class B
EN 61326-1 (industrial environment)
EN 61326-2-1
remote control interfaces
Ethernet / LAN
USB
ordering information
QDLL
option IEEE488
ordering information
RJ 45 10/100 Base-T
2.0 (high speed)
1303.4002.1
GBIP IEEE-488.2
QDLL
USB Type B
24 pin Amphenol type 57 series
female
IEEE488 option installed
1303.4002.2
All statements regarding setting and accuracy of the delay values are based on phase delay measurements in the
frequency range 800 MHz … 2800 MHz.
S-Parameters (typical responses)
Input Return Loss, typical value (S11)
0,00
-5,00
-10,00
-15,00
dB
-20,00
-25,00
-30,00
-35,00
-40,00
-45,00
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
f [MHz]
Becker Nachrichtentechnik GmbH ■ Kapellenweg 3 ■ 53567 Asbach - Germany ■ www.becker-hftechnik.de
Quality made in Germany
Subject to change in specification and design without notice.
preliminary version 1.20 - August 2015
RoHS compliant in accordance
with EU Directive 2011/65/EU
QDLL
Transmission, typical value (S21)
0,00
-2,00
-4,00
-6,00
dB
-8,00
-10,00
-12,00
-14,00
-16,00
-18,00
-20,00
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
f [MHz]
Channel Isolation (typical)
-60,00
-70,00
-80,00
dB
-90,00
-100,00
-110,00
-120,00
-130,00
-140,00
0
1000
2000
3000
4000
5000
6000
f [MHz]
Becker Nachrichtentechnik GmbH ■ Kapellenweg 3 ■ 53567 Asbach - Germany ■ www.becker-hftechnik.de
Quality made in Germany
Subject to change in specification and design without notice.
preliminary version 1.20 - August 2015
RoHS compliant in accordance
with EU Directive 2011/65/EU
QDLL
Typical Accuracy (2n * LSB)
15,00
10,00
delay variation
5,00
0,00
-5,00
-10,00
-15,00
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
f [MHz]
1 LSB
2 LSB
4 LSB
8 LSB
16 LSB
32 LSB
64 LSB
85 LSB
128 LSB
Scheme of a Trigger Compound
Becker Nachrichtentechnik GmbH ■ Kapellenweg 3 ■ 53567 Asbach - Germany ■ www.becker-hftechnik.de
Quality made in Germany
Subject to change in specification and design without notice.
preliminary version 1.20 - August 2015
RoHS compliant in accordance
with EU Directive 2011/65/EU
QDLL
Trigger IO responses (typical)
External Trigger (yellow) vs. RF Signal (blue), Trigger Mode “OUT”, with and without capacitive load
External Trigger (yellow) vs. RF Signal (blue), Trigger Mode “MASTER”, with and without capacitive load
Becker Nachrichtentechnik GmbH ■ Kapellenweg 3 ■ 53567 Asbach - Germany ■ www.becker-hftechnik.de
Quality made in Germany
Subject to change in specification and design without notice.
preliminary version 1.20 - August 2015
RoHS compliant in accordance
with EU Directive 2011/65/EU
QDLL
Front View
Rear View
Dimensions
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Becker Nachrichtentechnik GmbH ■ Kapellenweg 3 ■ 53567 Asbach - Germany ■ www.becker-hftechnik.de
Quality made in Germany
Subject to change in specification and design without notice.
preliminary version 1.20 - August 2015
RoHS compliant in accordance
with EU Directive 2011/65/EU