Jbl 7130 service manual

Page 1

JBL 7130
INSTALLATION
AND SERVICE

v

Page 2

Owners Instructions

Architectural Specifications

The 7130 compressor/limiter shall have an output capacity of
+18 dBm from 20 Hz-20 kHz, 11 dB and total harmonic distor-
tion shall be less than 0.25% to +18 dBm, 20 Hz-20 kHz in either
the compression or limiting mode with up to 30 dB of gain
reduction.

The unit shall accept high impedance, unbalanced microphones.
The microphone preamplifier circuitry shall employ field effect
transistors for low noise. The compressor shall be capable of any
combination of line-line, mic-mic, or line-mic operation. Bal»
anced inputs shall be possible by using optional input trans-
formers. Outputs shall be transformer isolated or direct for
connection to a balanced or unbalanced 600 51 line.

The compressor/limiter shall be equipped with a selector switch
to place the unit in one of three modes of operation: OUT,
COMPRESS, or LIMIT. The normal threshold of compression
shall be 0 dBm output. An input level control shall vary the gain
when the selector switch is in the OUT mode. It shall also deter-
mine the relative threshold when the unit is in the COMPRESS
or LIMIT mode. Two switches shall be provided for the selection
of three release times and three attack times.

The unit shall be equipped with a meter, governed by a function
selector switch, which indicates amount of compression or output
level in dB. When indicating output level, three ranges shall be
selectable so that 0 VU on the meter corresponds to an output
level of 0 dBm, +4 dBm, or +8 dBm, unbalanced, and +2 dBm,
+6 dBm, or +10 dBm balanced output. The unit shall operate

on 120/240 V AC, 50/60 Hz.

The unit shall be JBL Model 7130.

JBL continually engages In research related to product improvement.
New materials, production methods and design refinements are Intro-
duced Into existing products without notice as to routine expression
of the philosophy. For this reason, any current JBL product may differ
In some respects from Its published description, but will always equal or
exceed the original design specifications unless otherwise stated.

PRODUCT SPECIFICATIONS

Maximum Gain
Direct Input (Unbalancedll
Line 30 dB, high 2
Microphone 62 dB, high 2
Balanced Inputl

Line with 5195 84 dB, low 2
Transformer
Microphone with 30 dB, high 2
5901 Transformer
Output Characteristics
Output Impedance
Direct 40-80 0, unbalanced
I20 Hz-20 kHz)
Balanced 400-600 a
(20-20 kHz)
Maximum Output Level +18 dBm
Input Characteristics
Input Impedance
Direct Input (Unbalanced)
Line 15 kn
Microphone 51 km
Balanced Input
Line with 5195 15 kn
Transformer

Microphone with 5901 800 (I
Transformer

Normal Input Level
Direct Input IUnbalanced)
Line

Microphone
Input Pad 0

Input Pad -1 5
Input Pad -30

Balanced Inputl

Line with 5195
Transformer

Microphonel
Input Pad 0

Input Pad -15
Input Pad -30

Input Overload2
Direct input (Unbalanced)
Line
Microphone
Input Peel 0
Input Pad -15
Input Pad -30
Balanced Input

Line with 5195
Transformer

Microphone
Input Pad 0
Input Pad -1 5
Input Pad -30
Frequency Response
Direct Outputl
Direct Input
Line
Microphone
Balanced Inputl

Line with 5195
Transformer

Microphone with 5901
Transformer

Balanced Output
Direct Input
Line

Microphone
Balanced Input1

Line with 5195
Transformer

Microphone with 5901
Transformer
Total Harmonie Distortion3

Intermodulation Distortion1 '4

(SMPTE)
Direct Out
Direct Input (unbalanced)
Line
Microphone
Balanced Input
Line
Microphone
Balanced Output
Direct Input (unbalanced)
Line
Microphone
Balanced Input
Line
Microphone
Equivalent Input Noise '
Direct Input1
Line
Microphone

170 mV RMS minimum
(-13.5 dBm)

5.4 mV RMS minimum
(-41.5 dBm)

30 mV RMS minimum
(-28.1 dBm)

163 mV RMS minimum
(-13.1 dBm)

190 mV RMS minimum
(-12.5 dBm)

0.38 mV FIMS minimum
(-66.2 dBm)

2.15 mV RMS minimum
(-51.2 dBm)

11.8 mV RMS minimum
(-36.2 dBm)
11.5 V RMS (+235 dBm)

120 mV RMS (-16.2 dBmI
650 mV RMS (-1.2 dBm)
3.65 V RMS (+135 dBm)

3.32 V (+135 dBm]
9.2 mV RMS (-39.5 dBm)

53 mV FIMS (-24.5 dBm)
270 mV RMS (-9.5 dBm)

+0, -1 118,10 Hz-50 kHz
+0.25, -1 dB, 10 Hz--47 kHz

+1, -2 dB, 30 HI-ZO kHz

+1, -2 dB, 30 H1-20 kHz

+0, -1 dB, IO Hz-30 kHz
+0. -1 dB, 10 Hz-ZB kHz

+1, -2 dB, 10 Hz-ZO kHz
+1. -2 dB, 30 Hz-20 kHz

0.2%. 20 Hz-ZO kHz
@ rated output

0.005%
0.03%

0.007%
0.06%
0.0065%
0.06%
0.0085%
0.06%

-100 dBm
-126 dBm