Rockwell Automation COLLINS MP-20 Operator'S Manual Download Page 4 | Manualshive

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MP-20 radio set components

The MP-20 Radio Set, shown in figure 2, consists of the 719D-2A Receiver
Transmitter Group, 612A-1 Battery, 963A-l Radio Set Harness, H-189/GR Handset,
and 938A-2 Antenna.

Figure 2. MP-20 Radio Set Components

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Summary of Contents for COLLINS MP-20

Page 1: ......

Page 2: ...erpoise 15 938A 1 Antenna Vertical Orientation 16 938A 1 Antenna Horizontal Orientation 17 Operation 19 Preliminary Setup For Mobile Use 19 Preliminary Setup For Stationary Use 20 886B 1 Generator Ope...

Page 3: ...RF power output pep or average 280 000 communications channels in the 2 to 30 MHz band at 100 Hz increments SSB and AM operation Voice CW and data modulation Rugged construction Much smaller size and...

Page 4: ...et components The MP 20 Radio Set shown in figure 2 consists of the 719D 2A Receiver Transmitter Group 612A 1 Battery 963A l Radio Set Harness H 189 GR Handset and 938A 2 Antenna Figure 2 MP 20 Radio...

Page 5: ...imultaneously a 719D 1A Receiver Transmitter Group 612A 1 Battery and either an 886B I Generator or a spare 612A 1 Battery The field pack attaches to the rear of the pack frame and has compartments to...

Page 6: ...6 Figure 3 Accessories Components Sheet 1...

Page 7: ...mmunication Each wire has a 15 25 metre 50 foot throwing line attached The two wires are connected to a center junction which is connected to the receiver transmitter with a 15 25 metre 50 foot antenn...

Page 8: ...8 Figure 3 Accessories Sheet 2...

Page 9: ...urations for various missions Options that must be considered in selecting the proper configuration include type of input power mission duration transmission range stationary or mobile use one or two...

Page 10: ...sed either when the 719D 2A Receiver Transmitter Group is not being used or when it is in operation The 886B 1 Generator connects directly between the 719D 2A Receiver Transmitter Group and 612A 1 Bat...

Page 11: ...rest and tie securely Strings should be on the inward side of the pack frame Figure 4 Attaching Backrest to Pack Frame C Slide lower backstrap through slots on pack frame and connect turnbuckle to bot...

Page 12: ...p around the top of the frame between the tabs of the nylon backrest trough the buckle and pull tight Repeat the procedure with the other shoulder strap E The waist strap has a quick release assembly...

Page 13: ...on proceed as follows A Secure either the 377L 2 Receiver Transmitter Control or the 540K 1 Control Extender to the 671V 2 Receiver Transmitter using four screws Ensure that their mating connectors ar...

Page 14: ...n top of the battery and secure them together with the two latches on the battery Then slide the combination into the pack frame from the right side beneath the 719D 2A Receiver Transmitter group Mate...

Page 15: ...nded in the ground Refer to figure 8 C Place receiver transmitter with whip antenna near center of counterpoise D Connect the 1 8 metre 6 foot cable from the counterpoise center junction to the BNC co...

Page 16: ...relief Figure 9 Center Junction of 938A 1 Antenna NOTE In some cases better transmission is obtained if the operating frequency is three or five times the frequency at which the antenna is set B Make...

Page 17: ...or on the 549A 2 Amplifier Coupler D Erect the antenna with the wire as close as possible to the vertical position as conditions allow Refer to figure 11 Figure 11 Vertical Orientation of 938A 1 Anten...

Page 18: ...0 Repeat for the other half of the antenna C Connect the plug on the 15 25 metre 50 foot antenna feeder cable to the socket of the dipole center junction and connect the snap fastener to the anchor ri...

Page 19: ...ps waist strap and lower backstrap for maximum comfort Figure 13 Shoulder Strap and Waist Strap Quick Releases B Position whip antenna in a vertical position by pulling up antenna mount and then relea...

Page 20: ...1 Battery Cable is being used place the battery bag over the shoulder and strap it around the thigh of the operator under the outer garments D If the telegraph key is being used strap the key to the...

Page 21: ...from the front panel of the 377L 2 Receiver Transmitter Control Three versions of the 377L 2 Receiver Transmitter Control are shown in figure 14 A headset handset or telegraph key is connected direct...

Page 22: ...22 Figure 14 377L 2 Receiver Transmitter Control...

Page 23: ...one A low level sampling of the modulation signal used during transmission that is heard in the earpiece It is gated on by the transmitter and Indicates proper transmitter operation Low Voltage Tone A...

Page 24: ...mpleted with no tune incomplete indication voice transmission may be made Depress the ptt key on the handset or headset and proceed The presence of sidetone is an indication of transmitter output CAUT...

Page 25: ...and then back on or move one of the frequency digits on the receiver transmitter control off frequency and then back to the desired frequency Momentarily depress the ptt switch or telegraph key Tune t...

Page 26: ...indicated by the associated green lamp turning on The lamp will remain on until the discharge cycle is complete Complete discharging of a battery takes less than two hours When the green lamp goes of...

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