Operation Description; Interface Between Equipment - Sony PCS-G70N Service Manual

3-1. Operation Description

The configuration of the video communication system
(PCS-G70N/G70NP/G70NP2, PCS-G70S/G70SP) is as
follows:
PCS-G70N/G70NP
This system is composed of the PCS-PG70/PG70P (com-
munication terminal) and PCSA-CG70/CG70P (camera
unit)
. Communication terminal (PCS-PG70/PG70P)
. AC adaptor (PCS-AC19V6)
. Remote commander (PCS-RG70)
. Camera unit (PCSA-CG70/CG70P)
PCS-G70S/G70SP
. Communication terminal (PCS-PG70/PG70P)
. AC adaptor (PCS-AC19V6)
. Remote commander (PCS-RG70)
PCS-G70NP2
This system is composed of the PCS-PG70P (communica-
tion terminal) and two PCSA-CG70P (camera units).
. Communication terminal (PCS-PG70P)
. AC adaptor (PCS-AC19V6)
. Remote commander (PCS-RG70)
. Two camera units (PCSA-CG70P)
The equipment below is provided as an option for the
video communication system.
. ISDN unit (PCS-B384/B768, PCSA-B384S/B768S/PRI)
. Data solution box (PCS-DSB1, PCSA-DSB1S)
. Microphone (PCS-A1, PCS-A300, PCSA-A3, etc,.)
. Document stand (PCS-DS150)
. Communication transducer (CTE-600)
. Microphone with echo canceller (PCSA-A7P4)
. Camera unit (PCSA-CTG70)
PCS-G70N/G70NP/G70NP2
PCS-G70S/G70SP
Section 3
Operation Description

3-1-1. Interface Between Equipment

Interface between each equipment is explained below.
(a) Camera unit (PCSA-CG70/CG70P) — Remote
commander (PCS-RG70)
The SIRCS signal transmitted from the remote commander
is received in the photosensor on the front panel of the
camera unit.
(b) Communication terminal (PCS-PG70/PG70P)
— Camera unit (PCSA-CG70/CG70P): D-sub,
15-pin (Female) — Mini 23-pin (Female)
Power:
A power of +19.5 V (DC) that is supplied from an AC
adapter to the PCS-PG70/PG70P is sent to the camera unit
through the switch and fuse in PCS-PG70/PG70P.
Camera video signal:
The image read using the camera unit is input to the PCS-
PG70/PG70P using the YC video signal.
Infrared video signal:
The video signal modulated to infrared rays from an
optional document stand (PCS-DS150) is demodulated
after it is photo-sensed by the camera unit, and it is input to
the PCS-PG70/PG70P using a composite video signal.
VISCA signal:
The setting or operation of the camera unit is controlled
from the PCS-PG70/PG70P using a serial signal.
The status of the camera unit is output to the PCS-PG70/
PG70P.
SIRCS signal:
The SIRCS signal received in the photosensor of the
camera unit is output to the PCS-PG70/PG70P without the
carrier.
STANDBY signal:
The STANDBY signal controlled by the PCS-PG70/
PG70P is the POWER CONTROL signal of the camera
unit (not including a camera module (EVI-10EQ)).
The SIRCS receiver circuit of the camera unit, however, is
always power-supplied irrespective of the STANDBY
signal.
L (GND level): POWER ON
H (+5 V DC): POWER OFF
3-1 (E)