ADA-26A
Doc. No. – 13923
Page 3 of 3
ADA-26A AUDIO DISTRIBUTION AMPLIFIER
ADJUSTMENTS:
Common Mode Rejection and Gain are both set for optimum performance by Sigma Electronics.
AC Voltage Selection:
The primary wiring of T1 must be in accordance with the line voltage applied to the unit.
120 VAC
applications. The center-tapped wires must be soldered in the 120V position. Make sure the black
wire is in the hole next to the BLK printing on the circuit board.
230 VAC
applications. The center-tapped wires must be soldered in the 240V position. Make sure the black
wire is in the hole next to the BLK printing on the circuit board.
SPECIFICATIONS:
INPUT: ................................ Balanced, +24 dBm Maximum
INPUT IMPEDANCE: .......... 30 k
Ω
Balanced, 15 k
Ω
each line to ground
OUTPUT: ............................ +24 dBm Maximum
OUTPUT IMPEDANCE: ...... 150
Ω
Balanced
ISOLATION: ....................... 70 dB Minimum (15 kHz)
HUM and NOISE: ............... -90 dBm at Unity Gain
THD+N………………………. 0.005% 20 Hz to 20kHz (30kHz LPF)
GAIN RANGE: .................... -9 to +27 dB
CMR: .................................. 70 dB Minimum (20 Hz to 10 kHz)
60 dB Minimum (10 kHz to 20 kHz)
RESPONSE: ....................... +/- 0.2 dB Maximum to 100 kHz at Unity Gain
TECHNICAL MANUAL:
A manual including schematics, circuit description, parts list and setup guide is available upon request. This
information is intended for the service of the module. Modules should be serviced by Qualified Personnel only
! Sigma Electronics, Inc. recommends service to be performed by our Factory Service Center.
All specifications, drawings, dimensions, weights and other details are subject to change without notification.
Information is intended to give a general performance and operation guideline of the product.
Sigma Electronics, Inc.; P.O.Box 448; 1184 Enterprise Road; East Petersburg, PA 17520-0448
Main Office: Tel: (717) 569-2681 Fax: (717) 569-4056
REV1 DEC99
ADA-26A
