SCPC Satellite Channel Unit

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SCPC Satellite Channel Unit

Models SCU-2R, SCU-2RB, SCU-2P, SCU-2PE

SPECIFICATIONS

IF Interfaces

Signal Types

CAPSSB/TSSB/DMSK

Signal Bandwidth

5 kHz

Frequency Range

52 to 88 MHz

Frequency Step Size

5 kHz transmit, 50 Hz receive

Input Level

-30 dBm nominal

AGC Range

-50 to -20 dBm

Total Input Power

<5 dBm

Output Level

-20 dBm nominal

O/P Level Adjust

0 to -12 dB in 0.25 dB steps

Spurious

-55 dBc @ -20 dBm O/P

O/P Phase Noise @ 25°C

@ 100 Hz -70 dBc/Hz

@ 1 kHz -83 dBc/Hz

@ 10 kHz -100 dBc/Hz

Impedance

50

Connector

(R) BNC, (P) N Female

User Interfaces

Keypad/Display/Handset:

Keypad

4 x 4 matrix

Display

20 x 2 character

2Wire Audio:

Type

Loop-start/Ground-start

Connector

(R) RJ-11, (P) 2 pin to RJ-11 adaptor

Echo Canceller

CCITT G.165

ALC Range

16 dB

Asynchronous Data Port:

Levels

RS-232

Rates

75 to 9600 bps

Connector

DB-25S

Synchronous Data Port (R only):

Levels

RS-232

Rate

1200 or 2400 bps

Connector

DE-9S

Control and Maint. Port (R only):

Levels

RS-232

Rates

300 to 19200 bps

Connector

DB-25P

Transceiver M&C Interface (P only):

Connector

KPT02E14-15S

PERFORMANCE

DMSK

BER @ 2400 bps
BER @ 1200 bps

@45.8 dB-Hz
@40.5 dB-Hz

TSSB, STU-III, G3 Fax

BER @2400 bps

45.8 dB-Hz

CAPSSB

Audio Quality

near toll @ 50 dB-Hz
better than 2400 bps LPC @ 45.8 dB-Hz
intelligible @ 40 dB-Hz

Voice Activation

intrinsic except for -7 dBc pilot

Other

Signal Strength Measure

@ >32 dB-Hz

Frequency Acquisition

Range

programmable in 5 kHz steps up to ±27.5 kHz

Time

1 sec over ±27.5 kHz

MECHANICAL

P models

12.5" x 7.5" x 12" 20 lbs (9.1 kg)

R models

19" x 14" x 3.5" 11 lbs (5 kg)

ENVIRONMENTAL

Temperature (degrees C)

PE model

-40 to +50 operating

Other models

0 to +50 operating

All models

-40 to +65 storage

Altitude

40,000 ft. max

Shock and Vibration

normal transport

POWER

Input

90 to 260 VAC, 47 to 440 Hz

Consumption

SCU-2PE

<170 watts @ 120 VAC
<600 watts @ 240 VAC

Other

25 watts

MODELS

SCU-2P

0 to 50 deg. portable

SCU-2PE

-40 to 50 deg. portable

SCU-2R

rack-mountable

SCU-2RB

rack mountable excluding keypad/display/handset/ringer

Signal Types	CAPSSB/TSSB/DMSK
Signal Bandwidth	5 kHz
Frequency Range	52 to 88 MHz
Frequency Step Size	5 kHz transmit, 50 Hz receive
Input Level	-30 dBm nominal
AGC Range	-50 to -20 dBm
Total Input Power	<5 dBm
Output Level	-20 dBm nominal
O/P Level Adjust	0 to -12 dB in 0.25 dB steps
Spurious	-55 dBc @ -20 dBm O/P
O/P Phase Noise @ 25°C	@ 100 Hz -70 dBc/Hz @ 1 kHz -83 dBc/Hz @ 10 kHz -100 dBc/Hz
Impedance	50
Connector	(R) BNC, (P) N Female

Type	Loop-start/Ground-start
Connector	(R) RJ-11, (P) 2 pin to RJ-11 adaptor
Echo Canceller	CCITT G.165
ALC Range	16 dB

DMSK	BER @ 2400 bps BER @ 1200 bps	@45.8 dB-Hz @40.5 dB-Hz
TSSB, STU-III, G3 Fax	BER @2400 bps	45.8 dB-Hz
CAPSSB	Audio Quality	near toll @ 50 dB-Hz better than 2400 bps LPC @ 45.8 dB-Hz intelligible @ 40 dB-Hz
	Voice Activation	intrinsic except for -7 dBc pilot
Other	Signal Strength Measure	@ >32 dB-Hz
Frequency Acquisition	Range	programmable in 5 kHz steps up to ±27.5 kHz
	Time	1 sec over ±27.5 kHz

P models	12.5" x 7.5" x 12" 20 lbs (9.1 kg)
R models	19" x 14" x 3.5" 11 lbs (5 kg)

Temperature (degrees C)	PE model	-40 to +50 operating
	Other models	0 to +50 operating
	All models	-40 to +65 storage
	Altitude	40,000 ft. max
	Shock and Vibration	normal transport
POWER	Input	90 to 260 VAC, 47 to 440 Hz
Consumption	SCU-2PE	<170 watts @ 120 VAC <600 watts @ 240 VAC
	Other	25 watts
MODELS	SCU-2P	0 to 50 deg. portable
	SCU-2PE	-40 to 50 deg. portable
	SCU-2R	rack-mountable
	SCU-2RB	rack mountable excluding keypad/display/handset/ringer