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2.
Set FUNCTION switch to Gen. and DISPLAY switch to Gen/Mon Mtr.
3.
Select frequency from RF memory table or enter directly from keyboard.
4.
5.
Adjust 1 kHz level for 3.0 kHz deviation and RF level for 12 dB SINAD indication. (The mobile
radio audio output may be set to the desired level using the DVM AC mode.)
Read receiver SINAD sensitivity in microvolts or dBm.
R-2001A
FUNCTION
VERT/SINAD
DVM/COUNTER
FF LEVEL.
FREQUENCY
DPL CODE
RFIN/OUT
IN
l~ ~
-
1~.1
D&n
RF OUTPUT
LEVEL
c
MOBILE
RECEIVER
ANALOG SINAD
INDICATOR
NEG DEVIATION
:r~~~=~
Ilf
-
+
1(1
8521-23
DIGITAL SINAD
READING
POS DEVIATION
ANALOG
DEVIATION
INDICATOR
Figure 4-8.
Test Setup for FM Receiver Sensitivity Using Generator and SINAD Meter with CRT Display
b.
Test pager decode and alert function, and demonstrate simultaneous modulation.
1.
Set FUNCTION switch to Gen and DISPLAY to Tone Mem.
2.
Select pager frequency from RF memory table or enter directly from keyboard.
3.
Enter pager tone code frequencies and select desired time sequence in memory table.
4.
Activate and adjust Code Synth. Lvl. for 3.3 kHz deviation on Gen/Mon Mtr. display. (5 kHz
system)
NOTE
Timing sequences 1 through 4 are preset and can not be changed. Timing
sequences 5 through 8 are keyboard programmable for testing other pager types,
upper and lower timing limits, or future schemes.
4-18
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