TB 9-6625-1997-35
Frequency counter indications
Test instrument
(MHz)
IF MHZ
switch settings
Min
Max
4.300
4.29957
4.30043
5.600
5.59944
5.60056
5.625
5.62443
5.62556
5.650
5.64943
5.65056
10.00
9.99900
10.00100
11.50
11.49885
11.50115
b. Adjustments. No adjustments can be made.
13. Internal Modulation Frequency
a. Performance Check
counter to INT MOD OUT.
(2) Position controls as listed in (a) through (d) below:
(a) RF OUTPUT switch to 250 KUV.
(b) FUNCTION switch to 1000 HZ.
(c) LO-HI RF SET TO LINE control for a red-line indication on IF UV RF
SET TO LINE meter.
(d) DEVIATION RANGE - KHZ switch to 40.
(3) Adjust DEVIATION control for a full-scale deflection on DEVIATION KHZ
meter. If frequency counter does not indicate within limits specified in first row of table
(4) Repeat technique of (2) and (3) above for switch settings listed in table 9. If
frequency counter does not indicate within limits specified, perform adjustments listed
in table 9.
Test instrument
Frequency counter indications
FUNCTION
(kHz)
Adjustments
switch settings
(located on test instrument
(HZ)
Min
Max
lower left side)
1000
0.950
1.050
150
0.149
0.151
R16 INT MOD CALBR 150 Hz
FREQ (R)
400
0.395
0.405
R18 INT MOD CALBR 400 HZ
FREQ (R)
11
