28
SECTION 3
OPERATION
1. INTRODUCTION
Since operating instructions for the receiver depend largely on system integration, a complete
discussion of receiver operation is not presented here. However, Figure 1-1 shows the
appearance and location of controls on the front panel of the Model G-187 Special Purpose
Receiver.
2. CONTROL SETTINGS
a. POWER.--Turn on the power switch, S-105, located on the front panel.
b. FUNCTION SWITCH --The modulation and bandwidth (“Function”) selector switch (S-
102 A-F) has four positions, 40 Kc. AM, 40 Kc. FM, 200 Kc. AM or 200 Kc. FM. Use the
one that best fits your receiving needs, keeping in mind that:
(Positions 1-3): AM 40 Kc. or AM 200 Kc. -- The “Mon” AGC rotary switch (small inner
knob) could be in the “ON” (AVC) or the “OFF” (MAN) position, in the latter case the
manual RF gain control (R-102) should be adjusted to produce the desired overall gain.
(Positions 2-4): FM 40 Kc.or FM 200 Kc. -- The “Mon” AGC rotary switch (small inner
knob) and the RF gain control are inoperative in the FM positions. The zero-center tuning
meter (M-102) is operative only in the FM positions.
c. SQUELCH.--The squelch circuit is inoperative with the squelch control (R-107)
counterclockwise against its stop. In the absence of a signal, rotate the squelch threshold
control clockwise until the background noise just becomes inaudible. Any usable signal
should then disable the squelch circuit.
d. AUDIO GAIN -- Adjust as needed.
Содержание G-187
Страница 7: ...7 Figure 1 1 Model G 187 Special Purpose Receiver Front View...
Страница 9: ...9 Table 1 2 Semiconductor and Tube Complement...
Страница 10: ...10 Table 1 2 Semiconductor and Tube Complement continued...
Страница 14: ...14 Fig 2 1 Block Diagram Model G 187 Receiver...
Страница 44: ...44 Fig 4 1 Model G 187 Receiver Top View Cover Removed...
Страница 45: ...45 Fig 4 2 Model G 187 Receiver Bottom View Covers Removed...
Страница 46: ...46 Fig 4 3 Model G 187 Receiver Rear View...
Страница 47: ...47 Fig 4 4 Model G 187 Receiver Panoramic Top View Cover Removed...
Страница 48: ...48 Fig 4 5 Model G 187 Receiver Panoramic Top View Left Side Cover Removed...
Страница 49: ...49 Fig 4 6 Model G 187 Receiver Panoramic Top View Right Side Cover Removed...
Страница 50: ...50 Fig 4 7 Model G 187 Receiver Panoramic Bottom View Covers Removed...
Страница 51: ...51 Fig 4 8 Model G 187 Receiver Panoramic Bottom View Left Side Covers Removed...
Страница 52: ...52 Fig 4 9 Model G 187 Receiver Panoramic Bottom View Right Side Covers Removed...
Страница 53: ...53 Table 4 2 Model G 187 Receiver Component Boards Lists...
Страница 54: ...54 Fig 4 10 Model G 187 Receiver Large Component Board...
Страница 56: ...56 Fig 4 14 Model G 187 Receiver Master Slave RF Tuners Top View...
Страница 57: ...57 Fig 4 15 Model G 187 Receiver Master Slave Tuners Bottom View Covers Removed...
Страница 58: ...58 Fig 4 16 Model G 187 Receiver Master Slave Tuners Panoramic Bottom View Covers Removed...
Страница 59: ...59 Fig 4 17 Model G 187 Receiver Master RF Tuner Bottom View Cover Removed...
Страница 60: ...60 Fig 4 18 Model G 187 Receiver Slave RF Tuner Bottom View Cover Removed...
Страница 67: ...67 Fig 5 1 Model G 187 Receiver Schematic Diagram Master RF Tuner...
Страница 68: ...68 Fig 5 2 Model G 187 Receiver Schematic Diagram Slave RF Tuner...
Страница 69: ...69 Fig 5 3 Model G 187 Receiver Schematic Diagram 21 4 Mc 200 Kc BW IF Strip Master and Slave Channels...
Страница 70: ...70 Fig 5 4 Model G 187 Receiver Schematic Diagram 2 5 Mc 40 Kc BW IF Nuvistor Strip Master and Slave Channels...
Страница 71: ...71 Fig 5 5 Model G 187 Receiver Schematic Diagram Main Chassis Circuits...
Страница 72: ...72 Fig 5 6 Model G 187 Receiver Schematic Diagram Mainframe...
Страница 73: ...73 Fig 5 7 Model G 187 Receiver Schematic Diagram Power Supply Circuits...
Страница 74: ...74 Fig 5 8 Model G 187 Receiver Schematic Diagram Various Details...