Optimod-Surround 8685 V1.0 Operating Manual - Orban

3-64
OPERATION ORBAN MODEL 8685
Test Modes
The Test Modes screen allows you to switch between OPERATE, BYPASS, and TONE.
When you switch to BYPASS or TONE, the 8685 saves the preset you had on-air and
will restore it when you switch back to OPERATE. Even if you had been editing a preset
and did not yet save these changes as a User preset, you will not lose the edits
you made.
Table 3-11: Test Modes on page 3-64 shows the facilities available, which should be
largely self-explanatory.
In TONE mode, any channel can be set to OFF (the tone is off). ON (the tone is on) or
BYPASS (equivalent to placing that channel in BYPASS mode). When bench testing
the 8685, you can cause one hardware output to emit a tone while leaving the remaining
channels in BYPASS. Using a BNC/BNC patch cable, you can apply the tone to
any 8685 input for testing. This eliminates the need for an external test oscillator.
The tone oscillator tracks the WORD LENGTH and DITHER settings for that channel’s
output. Resolution as high as 24 bits is available. Activating dither will result in ideal
tones with no measurable harmonic distortion.
In the 2.0 processing, test modes function identically in 2.0 stereo and dual-mono
modes. For example, in dual mono mode, setting TONE CHAN to LEFT applies signal to
channel 1 but not to channel 2.
Setup: Test
Parameter Labels Units Default Range (CCW to CW) Step
Mode --- Operate Operate, Bypass, Tone ---
Bypass Gain dB 0.0 −18 … +25 1
Tone Frequency Hz 400 16, 20, 25, 31.5, 40, 50,
63, 80, 100, 125, 160,
200, 250, 315, 400, 500,
630, 800, 1000, 1250, 1600,
2000, 2500, 3150, 4000, 5000,
6300, 8000, 9500, 10000, 12500,
13586.76, 15000, 20000* [*44.1
kHz and higher output SR only]
LOG
Tone Level % 100 0 … 121 1
Lf Tone --- Bypass Off, On, Bypass ---
Rf Tone --- Bypass Off, On, Bypass ---
Ls Tone --- Bypass Off, On, Bypass ---
Rs Tone --- Bypass Off, On, Bypass ---
C Tone --- Bypass Off, On, Bypass ---
LFE Tone --- Bypass Off, On, Bypass ---
Lb Tone --- Bypass Off, On, Bypass ---
Rb Tone --- Bypass Off, On, Bypass ---
L 2.0 Proc x Tone --- Bypass Off, On, Bypass ---
R 2.0 Proc x Tone --- Bypass Off, On, Bypass ---
Table 3-11: Test Modes