CARRIAGE HOUSE 30 TO 260 CONVERTER
AND VISITOR ROOM SIGNAL SELECTOR (RACK 5)
30 MHZ RCP FROM CARRIAGE
HOUSE VIA CABLE COMPENSATION
AMPLIFIER IN RACK 7
TWO 3OMHZ SIGNALS
TO VISITOR EQUIPMENT
ROOM
RCP (OR POL A)
11
FP
FP
LCP (OR POL A OR POL B)
-20dB
-20dB
30MHZ
-3
100 MHz
LOW PASS
255-265MHZ
BANDPASS
3dB
3dB
LO RCP
30 MHZ LCP FROM CARRIAGE
HOUSE VIA CABLE COMPENSATION
AMPLIFIER IN RACK 7
5-12
TWO CARRIAGE
HOUSE SIGNALS,
UPCONVERTED TO
260 MHZ
11
FP
FP
-3
30MHZ
100 MHz
LOW PASS
L0 2 +13dBm
CHANNEL 2
6dB
30 MHz to 260 MHz UPCONVERTER RACK 6 UNIT 19
290-MHz LO Inp
5-13
30-MHz Signal Inp
Front
BANDPASS FILTER
30 MHZ CENTER FREQ
12 MHZ BANDWIDTH
"OUT 2" (REAR PANEL)
19
"OUTPUT 2" (FRONT PANEL)
3dB
-3
BANDPASS FILTER
30 MHZ CENTER FREQ
12 MHZ BANDWIDTH
BLANK
BANDPASS FILTER
30 MHZ CENTER FREQ
40 MHZ BANDWIDTH
Rear
NORMAL
Rear
-3
19
"OUT 1" (REAR PANEL)
19
"OUT PUT 1" (FRONT PANEL)
-3
11
3dB
I
LO INPUT FOR CHANNELS 1 & 4
FROM p2 (SYNTH. 4, PORT 1 FROM LO
DISTRIBUITION CHASSIS,
RACK 5 UNIT 7)
BPF
260 MHz CF
30 MHz BW
R
3dB
L0 4 +13dBm
CHANNEL 4
BANDPASS FILTER
30 MHZ CENTER FREQ
12 MHZ BANDWIDTH
3dB
19
"OUT 4" (REAR PANEL)
19
"OUTPUT 4" (FRONT PANEL)
19
"OUT 3" (REAR PANEL)
19
"OUTPUT 3" (FRONT PANEL)
-3
F "SINGLE INPUT"
NOTE: CH A & CH B delays are
matched in "Thru" mode.
Thru
BANDPASS FILTER
30 MHZ CENTER FREQ
40 MHZ BANDWIDTH
NORMAL
SW is currently controlled
manually from front panel,
but will eventually be under
remote control.
3dB
LO INPUT FOR CHANNEL 3
FROM p2 (SYNTH. 3, PORT 1 FROM LO
DISTRIBUITION CHASSIS,
RACK 5 UNIT 7)
See 'WB_30-260MHz)conv.fc7'
& 'Coil_driver.fc7'
12
3dB
-3
BLANK
Convert
Rear
Rear
SELECT 30 MHZ SOURCE FOR VISITOR ROOM
CARRIAGE HOUSE ch OR GREGORIAN grn (grw=grn)
EXAMPLE: if2 "if2_vis30mhz grn"
-3
L
SIGNAL INPUT FOR CHANNELS 3 & 4
FROM CHANNEL B, AMP 2, PORT 2 (page 2)
THIS IS HOW CH SIGNALS GET
INTO THE "NORMAL" IF PATH,
VIA SELECTION IN 5-4.
Front
CHANNEL 1
6-19
LCP
3dB
LO LCP
19
-3
3dB
SIGNAL INPUT FOR CHANNELS 1 & 2
FROM CHANNEL A, AMP 2, PORT 2 (page 1)
TO TRANSFER SWITCH (p. 1)
IN RACK 5-4.
255-265MHZ
BANDPASS
3dB
LO INPUT FOR CHANNEL 2
FROM p2 (SYNTH. 2, PORT 1 FROM LO
DISTRIBUITION CHASSIS,
RACK 5 UNIT 7)
RCP
-20dB
-20dB
260 MHZ TO 30 MHZ DOWN CONVERTER RACK 5 UNIT 13
CHANNEL 3
T ("DUAL INPUT")
BANDPASS FILTER
30 MHZ CENTER FREQ
12 MHZ BANDWIDTH
-3
CAL COMMAND SELECTOR
EXAMPLE: if2 "if2_calsrc 8"
3-BIT CONTROL FROM HPIB CHASSIS
L0 3 +13dBm
3dB
4
6dB
"BLANKING ENABLED"
"BLANKING ACTIVE"
3
2
1
"LOGIC PROBE"
50
NC
REAR PANEL BNC INPUTS
NC
FROM INTERIM CORRELATOR
25 HZ SQ. WAVE FROM CLOCK DIST.
3
9
3
ENABLE BLANKING INPUT
EXAMPLE: if2 "if2_430blnk T"
(USED FOR 430 MHZ RADAR)
PAGE 3 OF 3: 260 MHZ TO 30 MHZ CONVERTER,
CARRIAGE HOUSE 260 TO 30 CONVERTER
30 MHz to 260 MHz UPCONVERTER
AND VISITOR ROOM SIGNAL SOURCE SELECTOR,
CAL ENABLE SELECTOR
2
CAL ON/OFF CONTROL SOURCE-SELECTOR - RACK 5 UNIT 11
TTL HI = BLANKING ON
TTL LO = BLANKING OFF
NO CONNECTION = BLANKING OFF
8:1 MUX
3
4
10
SOURCE #7
FRONT PANEL BNC
"1"
"0"
CAL ON/OFF CONTROL
SIGNAL TO DOME
5
6
7
SELECT 2 BANDS FROM POL. A & 2 BANDS FROM POL. B ("TRUE")
OR 4 BANDS FROM POL. A ("FALSE")
EXAMPLE: if2 "if2_2a2b30 T"
SOURCE #8
FRONT PANEL
TOGGLE SW.
8
LED
"1"
"0"
file: ifloblok jbh 1-29-01 REV APR. 7, 2005
IFDWN3(rev).fc7 DEW 11 Feb 2009 (added switchable upconverter in 6-19)
IFDWN3(rev_2).fc7 DEW 28 Aug 2012 (corrected paths into & out of 5-12)
FRONT PANEL LEDS
INDICATE SELECTED
INPUT PORT
1
BLANKING INPUT
DOWNSTAIRS IF-LO SYSTEM
FUNCTIONAL BLOCK DIAGRAM
3 LINE
TO
8 LINE
DECODER
5-11
BNC MONITOR PORT
(SELECTS THE ON/OFF CONTROL SOURCE FOR A SINGLE CAL ON/OFF SIGNAL THAT GOES TO THE DOME.
IN THE DOME, A DISTRIBUTOR ROUTES THE SIGNAL TO THE CAL DIODE(S) OF A SELECTED RECEIVER)