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AM5(e) Classic Instruction Manual
4.5.3 SEND 1004 Hz Test: This test activates 1.004 kHz continuous test tone, checks
MEASURE functions, and verifies operation of HOLD TONE indicator and
notch filter for noise tests. Unless otherwise indicated, a test cable must be
connected from TX/2W jack to the RX jack (or between rear terminals).
1.
Set MONITOR switch to the TX position and turn volume control to about
1/8 turn clockwise (from full counter-clockwise).
2.
Press the left SEND key until 1004 Hz is lighted.
•
Tone will be heard from speaker.
3.
Press MEASURE until LEVEL FREQ is lighted.
4.
Press DISPLAY until SEND is lighted
•
Left display will read 00.0 ±1 (1.0 through -1.0) with dBm lighted.
•
Right display will read 1.004 ±.002 (1.002 through 1.006) with kHz
lighted.
5.
Press DISPLAY until MEAS is lighted.
•
Displays will read the same as step 4 (assumes TX/2W jack is connected
to RX jack).
6.
Set MONITOR switch to RX position.
•
Tone will be heard from speaker
7.
Press MEASURE key until NOISE is lighted
•
For AM5 Classic — Left display will read 90.0 ±1.0 with
•
For AM5e Classic – Left display will read 00.0 ±1.0 with dBm lighted.
•
Right display will be blank. (Frequency measurement is disabled
during NOISE measurement.)
8.
Press MEASURE key until NOISE W/T (Noise with Tone) is lighted.
•
Green HOLD TONE LED will be lighted beside left display.
•
For AM5 — Left display will read less than 40.0 with dBrn lighted.
•
For AM5e – Left display will read less than –50.0 with dBm lighted.
•
Right display will read 1.004 kHz
•
Tone will be heard from speaker. (Tone will be fainter if MONITOR
switch is set to the MEAS position.)
NOTE: NOISE with Tone incorporates a sharply-tuned notch filter at 1.004 kHz.
This filter keeps the HOLD tone from the measuring circuits. In some cases, this
level will be low enough that "undr" is shown in the left display. In this case, the
right display will be blank.
November 19, 1997
(18-0047)
SELF TEST and CALIBRATION
Page 4-6
dBrn
lighted.
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