Studer A1 - A5: Input Gain Check and EQ Preadjustments

A Series Active Monitor Speakers
E4/26 Service Date printed: 29.02.00
4.5.1.5 A5: Input Gain Check and EQ Preadjustments
These preadjustments must be performed only if RT1 through RT4 are
completely out of range; these settings will be fine-adjusted on the assem-
bled unit, also refer to section 4.5.2.5.
Steps Generator Measurement
No. Description Id Value Test pos. Type Value Limits
1 RT52 input gain adjust G1 –26.6 dBV/60 Hz/sine wave M1 Level –20.0 dBV ±0.5 dB
2 Roll-off check G1 –26.6 dBV/60 Hz/sine wave M1 Level –29.0 dBV ±0.5 dB
3 RT1 adjust G1 –26.6 dBV/6.8 kHz/sine wave M1 Level –19.6 dBV ±0.5 dB
4 RT2 adjust G1 –26.6 dBV/8.7 kHz/sine wave M1 Level –20.0 dBV ±0.5 dB
5 RT3 adjust G1 –26.6 dBV/14.7 kHz/sine wave M1 Level –21.0 dBV ±0.5 dB
6 RT4 adjust G1 –26.6 dBV/22.0 kHz/sine wave M1 Level –19.8 dBV ±0.5 dB
7 Repeat steps 3 through 6 until all values are within the given limits
Level
–2
+4
–1
0
+1
+2
+3
40
40 k
50 100 200 500 1 k 2 k 5 k 10 k 20 k
[dBr @ –20 dBV]
[Hz]
40
40 k
50 100 200 500 1 k 2 k 5 k 10 k 20 k
[Hz]
0
–3960
–3600
–3240
–2880
–2520
–2160
–1800
–1440
–1080
–720
–360
[°]
Phase