Operating instructions

LOCAL OPERATION
3-8
Rear panel controls and connectors
C5901
SERIAL
PORT
EXT MOD
IN
EXT. STD
1/2/5/10MHz
DEMOD
OUT
100W MAX11-32VDC
DC SUPPLY
+
-
24
2321 22
26
25
27282920
AC SUPPLY
100-240V ~
50-60Hz
108-118V ~
50-400Hz
190VA
T2AL250V
T10AH250V
!
Fig. 3-3 Rear panel layout, (with optional GPIB fitted).
On the rear panel of the Service Monitor are:-
(20) AC power supply input connector. One range for all mains voltages. See the Performance data
section in Chapter 1. The AC supply fuse is contained within this connector.
(21) DC supply input voltage connector. For powering the Service Monitor from DC supplies. See
Performance data, in Chapter 1.
(22) DC supply pin connection diagram. Shows the polarity of the DC power connector.
(23) DC supply fuse.
(24) GPIB interface connector. This connector is only present when the GPIB interface option is
fitted. Connection details are given in Chapter 2, under Remote control connections, GPIB.
(25) GPIB interface unit. Optional. See (24) above.
(26) External frequency standard input. This can be 1, 2 5 or 10 MHz; the Service Monitor will
identify the applied frequency. In the event of external standard failure, control will revert to the
internal standard.
(27) Demodulated signal output. The demodulated signal removed from the input RF signal is
brought to this connector for feeding to external equipment.
or
IF Output. When Option 31 is fitted, the IF Signal is routed to this connector. The demodulated
signal output facility is not then available.
(28) EXT MOD IN (External modulation input). A signal applied to this connector can be used as a
modulation source for the receiver test signal. The input level of the applied signal should be
1.00 V (RMS sinewave) in order to maintain the correlation with the modulation level calibration.
Refer to Performance data, RF generator, in Chapter 1 of this manual for frequency ranges.
(29) Serial port. The SERIAL PORT connector provides RS232 interface facilities for remote control.
It is also used for the serial output to a printer. Connection details are given in Chapter 2, under
Remote control connections, RS232.