Audio Input
No. 6 screw terminals
0 to +10 dBm peak, balanced, 600 Ohm or bridging
Discrete Left & Right or Sum & Difference

Remote Inputs
No. 6 screw terminals
6 to 24 VAC, 10 to 24 VDC
Floating, optically isolated

Composite Video in/Out
BNC connectors
Bridged loop thru

External SAP & Pro Generator Inputs
BNC connectors
SAP: 3.5 V peak to peak produces +/- 15 kHz of deviation
Pro: 3.5 V peak to peak produces +/- 3 kHz of deviation

Remote Binary Outputs
No. 6 screw terminals
Isolated relay contacts
Maximum 0.5 A at 30 V non-inductive

Remote Meter Output
0 VDC to 5 VDC, 1 k Ohm source impedance

Composite Baseband Output (For +/- 73 kHz deviation)
Unbalanced BNC connector
0 V to 8 V peak to peak, high Z
0 V to 4 V peak to peak, 75 Ohm load

Unbalanced XLR connectors (two)
0 V to 8 V peak to peak, high Z
0 V to 4 V peak to peak, 39 Ohm load

Balanced (Optional) Male XLR type (two provided)

• +/- 0 V to 8 V peak to peak
• 78.7 Ohm impedance, other values on special order
• Drives up to 2500 feet (762m) of Belden 9463 twinax cable terminated with an optional MSI line receiver.

Front Panel:
6.96 x 19 (177 x 483)

Chassis:
6.96 x 17 x 14.37 (177 x 432 x 365)

Meter Channel:
Tells what parameter is displayed on the D'Arsonval meter

Attenuation:
Loudness control attenuation in 0.5 dB steps

Stereo:
TSG is in stereo mode

Mono:
TSG is in mono mode

Sync:
Positive indication that video sync is being received and TSG is locked.

Stereo Rev:
Alarm that one channel of incoming audio is reversed, causing monaural cancellation

Fuse:
Indicates primary AC fuse blown

BTSC board LEDs:
LEDs on BTSC board for setting precise 100% reference level

Meter Select:
Positions meter (as indicated by meter channel LEDs) on desired parameter

Input Level:
Sets the level of Left & Right audio into the TSG; if the input board is strapped for matrix input, sets Sum and Difference levels

Mono/Stereo:
Switches the TSG alternately between monaural and stereophonic operation

Loudness Step:
Each time pressed, reduces program level 0.5 dB

Loudness Reset:
Smoothly restores program level to normal use after Loudness Step

Gate:
Sets threshold of gain expansion on quiet program material and prevents "pumping"

HFR:
Sets amount of high frequency audio gain reduction applied

Limit:
Sets threshold of broadband peak limiting

Less than +/- 90 Hz deviation of main carrier

Greater than 55 dB below +/- 50 kHz deviation of main carrier

BTSC (dbx encoded) +/- 0.3 dB 50 Hz to 14 kHz no more than -2.0 dB at 15 kHz

75 microsecond equivalent mode +/- 0.3 dB 50 Hz to 15 kHz

At any frequency from 50 Hz to 15 kHz at 25, 50 and 100% modulation; 100% modulation = +/- 25 kHz deviation for L+R; +/- 50 kHz for L-R; Bandwidth = 30 kHz, measured with 75 microsecond deemphasis or BTSC decode.

Main channel (L+R) less than 0.05%

Subchannel (L-R) less than 0.05% (75 microsecond equivalent mode)

Subchannel (L-R) less than 0.3% (BTSC mode) note: 100% modulated BTSC measurement made with dbx clipper disabled.

75 microsecond equivalent mode 50 Hz to 15 kHz: greater than 50 dB.

BTSC (dbx encoded) Up to 12 kHz: greater than 40 dB Up to 14 kHz: smoothly decreasing to greater than 36 dB

Into main channel from L-R subcarrier: greater than 60 dB below +/- 25 kHz deviation.

Into L-R subcarrier from main channel: greater than 60 dB below +/- 50 kHz deviation.

FM noise in Left and Right channels: greater than 80 dB below +/- 25 kHz deviation M channel.

FM noise in L-R subchannel: greater than 85 dB below +/- 50 kHz deviation D channel.

FM noise in L+R subchannel: greater than 85 dB below +/- 25 kHz deviation M channel.