Dolby Laboratories 737 Manuale Utente

Model 737 Soundtrack Loudness Meter - Leq(m) 

Cat. No. 448B Input Adapter Board

3-6

Set the DS4-E into Discrete mode (one green LED).

Send tone at Dolby Level to the studio monitor bus and align the Model 737 as 
described in Section 2.3.6 - Calibration Procedure (Dolby Digital).

Note: If LK1-4 are in the lower position, the L & C input trimpots on the 
Model 737 will be reversed.

Set the DS4-E into Matrix Monitor mode with the SR/A or Proc 2 switch not 
illuminated.

Ensure the DS4-E meter is in direct mode (rear toggle switch up) and the red 
rotary switch on the Cat. No. 291 of the DS4-E is set to Lt/Rt position.

Send tone at Dolby Level to Lt/Rt (-6 dB on DS4-E meter) and check Model 737 
for 85 per channel.

Select SR on the DS4-E (SR/A or Proc 2 switch illuminated) and check Model 737 
for 88 per channel.

Place the DS4-E meter to Monitor position (rear toggle switch in down position) 
and adjust the rear trim pots on the meter for -6 dB per channel (the DS4-E must 
be in SR mode).

Thread up and play a length of Cat. No. 69T and insure alignment of Cat. 
No. 240A.

Set the DS4-E in Matrix, A, and Optical mode and adjust RV1(L) and RV2(R) 
for a null point of 85 per channel on the Model 737.

10. Set the DS4-E in Matrix, SR, and Optical mode and check that the Model 737 

reads 3 dB higher on each channel.