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M20 ADDENDUM 2.1 MA-1
M20 MAJOR FEATURE
UPDATE: VERSION 2
Version 2.00 Features
RS-422 (SONY 9-PIN) SLAVE OPERATION
The Online Source page in the Utility menu now has the “RS-422” parameter added to
its choice of online control source settings. Two new utility pages have also been added
to facilitate RS-422 slave track arming operations. When Online Source is set to RS-422,
the M20 will recognize standard Sony 9-pin control commands. The M20 is optimized
for BVU-950 emulation.
The way RS-422 Edit Preset commands record arm M20 tracks is determined by the RS-
422 Track Arm and RS-422 Mapping settings. These Utility pages are defined as
follows:
RS-422 TRACK ARM: ON/OFF
When on, the M20 will respond to RS-422 Edit Preset commands by record arming M20
tracks according to the mapping page setting. When off, local track arming from the
M20 front panel is allowed i.e., Edit Preset commands are ignored. Local track arming is
recommended when slave M20s (ID 2 and above) must be record enabled, or when ID 1
record arming that does not follow the assigned RS-422 mapping scheme is desirable.
RS-422 MAPPING: 1-2, ODDEVN, (LOCAL)
This parameter sets the mapping for 2-track (BVU-950) Edit Preset commands. When
set to 1-2, an A1 or A2 track arm command will record arm M20 tracks 1 and 2
respectively. No mapping to other M20 tracks will occur. When OddEvn (Odd/Even) is
selected, an A1 track arm command will record arm tracks 1, 3, 5, and 7 (the odd
channels) and an A2 track arm command will record arm tracks 2, 4, 6, and 8 (the even
channels). If an RS-422 controller can force an emulation type other than SONY BVU-
950 (e.g. Sony DVR-10 or Fostex RD-8) for the purposes of using A1-A4 (4 track Edit
Preset) or Da1-Da8 (8 track Edit Preset) arming with the M20, the map setting will be
ignored. This, for example, will allow an A1 or A2 track arm command from a DVR-10
(a VTR with 4 audio tracks) to record arm track 1 or track 2 of the M20 without
mapping, i.e. M20 tracks 3 and 4 can be record armed independently with an A3 or A4
Edit Preset command regardless of the map setting.
If RS-422 Track Arm is off, “(Local)” is indicated in place of the mapping selection and
editing is not allowed. When Track map is turned back on, the previously selected RS-
422 mapping selection is reverted to and editing is allowed.