IFR FM/AM-1200A Operation Manual page 292

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SECTION 3 · DESCRIPTION OF CONTROLS,
CONNECTORS & INDICATORS
Figure 3-1 FM/AM-1200S/A Front Panel Controls, Connectors
&
Indicators
1. MODULATION METER
2. Modulation Meter Zero
Adjustment
3. MODULATION Select Control
4. Modulation METER Control
5. VAR Tone Selector Switch
6. VAR Tone Level Control
7. 1 kHz Tone Selector Switch
8. 1 kHz Tone Level Control
9. RF Level Attenuator Control
10. RF Level Attenuator Vernier
Control
11. T/R Connector
1 2 . AU X P 0 WE R Connector ( 0 p t i on 0 5
Gen. Amp only)
13. REF CAL Adjustment
14. DUPLEX Output Connector
15. EXT MOD/S!NAD Connector
16. DEMOD Connector
17. TONE OUT Connector
18. Keyboard
19. M!C/ACC Connector
20. SCOPE/DVM Connector
21. AC/GND/DC Switch (Scope)
22. PWR/OFF/BATT Switch
23. Scope VERTICAL Attenuator
Vernier Control
24. VERTICAL Attenuator Selector
Control
25. HORIZONTAL Sweep Vernier
Control
26. HORIZONTAL Sweep Selector
Control
27. VERT POS Control
28. I NT Control
29. FOCUS Control
30. HORIZ POS Control
31. CRT Display
32. GEN/LOCK Control
33. LOCK Lamp
34. ANT Connector
35. FREQ ERROR Meter Range Selector
Cant rol
36. FREQ ERROR Meter
37. VFD (Vacuum Fluorescent Display)
38. FREQ ERROR Meter Zero Adjustment
39. MODE Selector Control
40. VOLUME Control
41. SQUELCH Control
42. SIG Indicator Lamp
DETAIL
A
FM/AM-1200S ONLY
1IA.
FM/AM-12005
VERT POS INT FOCUS HORIZ POS
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VERTICAL HORIZONTAl
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3-1 FM/ AM-12008/ A FRONT PANEL (Reference Figure 3-1)
ITEM NAME DESCRIPTION
1. MODULATION Meter
Provides a visual display of modulation levels, RF power levels
(peak and average), relative signal strength, battery test voltage,
distortion and SINAD when selected by MODULATION Meter Control (4).
(See Figure 3-2.)
2. Modulation Meter Zero Adjustment
Adjustment screw for mechanical zeroing of MODULATION Meter (1)
when power to FM/AM-1200S/A is ''OFF'' .
3. MODULATION Select Control
Selects modulation and demodulation modes of FM/AM-1200S/A receiver
for FM, AM, SSB and their associated pre- and post-detection band-
widths as shown in Table 3-1.
MODULATION
SELECT CONTROL DEMODULATION PRE-DETECT I ON POST-DETECTION
POSITION MODE BANDWIDTH BANDWIDTH
AM
NAR AM 6 kHz 8 kHz
NORM AM 15 kHz 8 kHz
SSB SSB 6 kHz 8 kHz
FM
NAR FM
15 kHz
8 kHz
MID FM 200 kHz 8 kHz
WI DE FM 200 kHz 80 kHz
Table 3-1 Modulation Select Control Positions
4. Modulation METER Control
sefects input source for MODULATION Meter (1) as shown in Table 3-2
(Reference Figure 3-2).
3-1 Blank/3-2
05