SPGU-35 Airborne intercommunication system
SPGU-35 is designed to provide intercommunication between the crewmen, external radio communication, listening to navigation and audio warning signals, communication with ground maintenance personnel, public addressing to the passengers in the cabin by the crew, and voice transmission to cockpit voice recorder.
Main features:
- two-way internal telephone communication for the crew as well as for communication with ground maintenance personnel (GMP);
- external communication for the crew by connecting each crewman control panel to any of the four radios;
- listening to navigation devices signals (NAV): separate of simultaneous with external communication;
- simultaneous listening to special signals (SST);
- activation of squelch with preset of the threshold via the channels of listening to SST;
- listening to NAV signals and to external communication via the radio during the communication via intercom and listening to intercom communications during the external communication.;
- self-listening and listening to the messages via headsets of the crew as well as via the cabin external loudspeaker;
- separate adjustment of internal. external and PA signals volume; joint adjustment of the listening to NAV and to the radio set (additional listening);
- interfacing with cockpit voice recorder to record the crew conversations during internal and external communication, including voice recording from microphones when PTTs are not pressed
- priority for control of the radios, PA according to user number increasing.
Specifications
| Parameter | Value |
|---|---|
| Amplifying paths operating frequency range, Hz | 300 to 4000 |
| LFA amplifying paths operating frequency range, Hz | 200 to 8000 |
| Power consumption from aircraft mains 27 V, W | |
| - Amplifying and switch unit B27-35 | 20 |
| - Control panel B7А-35 | 4,5 |
| - Control panel B7-226 | 3 |
| - Control panel Б8-226 | 6 |
| - PA amplifer LFA 2х3/LFA 2х10 | 5/40 |
| The number of users (crewmen) | up to 5 |
| The number of GMP users | 3 |
| The number of the output channels to CVR | 7+1 |
| Power supply from aircraft mains, V | 24 - 29,4 |
| The number of the connected radios for external communication | up to 4 |
| Operating temperature, °С | |
| - high | + 55 |
| - low | - 55 |
| Dimensions (WхHхD), mm | |
| - Amplifying and switch unit B27-35 | 160x71x220 |
| - Control panel B7А-35 | 146x80x122 |
| - Control panel B7-226 | 146х64х124 |
| - Control panel B8-226 | 146х80х119 |
| - PA amplifer LFA 2х3, LFA 2х10 | 90х50х131 |
| Weight, kg | - Amplifying and switch unit B27-35 |
