Daniels Electronics MT-3 Series, Инструкция по эксплуатации

Страница: 33 / 56

Transmitter Alignment
29
MT-3 FM Transmitter Mainboard Instruction Manual
IM20-MT3TXMN
Section B: microphone audio Setup
Step Reference Action Desired Results Notes
17.
Microphone Input
Front Panel Pin 2
Apply Tone.
AF Gen: 1 kHz Tone
@ +10 dBm
A
DATE: 28 MARCH 2005
TITLE: TX MICROPHONE CONNECTOR DETAILS
DRAWN BY: EVA DANIELS
REV DATE: - - -
DWG No: B0486-01
DANIELS
ELECTRONICS LTD
TM
1
11
21
2
12
22
3
13
23
4
14
24
5
15
25
6
16
26
7
17
27
8
18
28
9
19
29
10
20
30
FRONT VIEW
3 2
4 1
MIC AUDIO
MIC GND
MIC Connector – Front View
18. R63 (Mic Comp) Adjust and measure. Distortion Analyzer
AF Filter: 15 kHz
4.0% THD
19. Microphone Input
Front Panel Pin 2
Change level. AF Gen: 1 kHz Tone
@ -10 dBm
20. R2 (Microphone) Adjust and measure. ± 3 kHz Deviation monitor
21. Microphone Input
Front Panel Pin 2
Change level. AF Gen: 1 kHz Tone
@ -20 dBm
22. R2 (Microphone) Measure and confirm
± 50 Hz.
± 1 kHz Deviation monitor
Section C: audio frequency response and deviation
Step Reference Action Desired Results Notes
23. AF Gen level Set and measure. AF Gen: +10 dBm
24. Balanced Audio Input Sweep from 300 Hz to
2.5 kHz in 100 Hz steps.
± 5.0 kHz Deviation should not
exceed maximum
deviation.
25. Balanced Audio Input Apply tone. AF Gen 1 kHz
@ -18 dBm
26. Perform AF Frequency
Response from 300 Hz to
5 kHz.
As per test sheet limits
(FIT-018)