Duplex Sensitivity - Motorola R2010D Operator's Manual

F. DUPLEX SENSITIVITY
1) Connect R2008D to transceiver unit via the junc-
tion box. (Refer to Fig. 14.)
2) Connect duplex generator output to variable tap
on RF tee through a 60 dB attenuator. (Part No.
58-80314B21)
3) Set: Duplex gen to 45 MHz RF step to -50dB
IMAGE/DPLX to high
BW to wide
Display to duplex gen
Function to gen
4) Select desired frequency (825 MHz
+
0.03 X
channel
#).
5) Using Duplex Gen display adjust the duplex gen
vernier for.45 MHz offset. Adjust 1 KHz modu-
lation for 8 KHz deviation.
Set function switch to PWR MON.
6) Usi?g manual test mode, send the following
commands to the transceiver unit:
01 Suspend
09 Load synthesizer (input desired channel
#)
12 Receiver unmute
7) Connect RX audio on junction box to sinad in-
put on R2008D.
8) Using DVM/DIST display, adjust variable tap
on RF tee for 12 dB sinad.
9) Using manual test mode, execute command 07
Carrier On, to key the transmitter. '
10) Check sinad reading on DVM/DIST screen. Sen-
sitivity will degrade if transceiver has a de-sense
problem.
{=:::::::::======' \ ====,
===D
,-----.L...J------.1
DU7
INSERT
60db ATTENUATOR
HERE
R2008D
R2010D
I
I
VERT/SINAD
~PUT
TO
POWER
SUPPLY
CELLULAR
RADIO
18
01-80356A 73
CTX J
:)
:, RX J
0
0
JUNCTION
BOX
DUPLEX SENSITIVITY
FIGURE 14.