BURL BAD4M User manual

BAD4M
DAUGHTER CARD
Quick Start Guide
Revision A November 7, 2019
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Important information regarding BAD4M latency:
The BAD4M uses jumpers on “JP1” (as shown on cover) to adjust 2 variables: ADC
lter selection, high pass lter, and AVID HDIO delay matching.
Jumper A - ADC Filter Setting:
In default mode with no jumpers set, the BAD4M uses the short delay lter
with the classic “Burl Sound”. (Image 1) A jumper on “A” will switch to the long
delay lter, with longer latency and a more forward mid-range. (Image 2)
Jumper B - Avid Delay Matching:
Setting a jumper on “B” will increase latency to match the output delay of an
Avid HDIO. This is for short lter only. (Image 3)
Jumper C - BAD4 Delay Matching:
Setting a jumper on “C” will match the delay of the BAD4 input daughter card.
This will work with both short and long lters. (Image 4)
Jumper D: High-pass Filter Bypass:
Setting a jumper on “D” will bypass the high-pass lter. (Image 5) (Not recom-
mended)
Image 2: ADC Filter Set-
ting - Jumper is set to “A”.
Image 1: Default Jumper
Settings - No jumper set.
Image 3: Avid Delay
Matching - Jumper is set to
“B”.
Image 4: BAD4 Delay
Matching - Jumper is set to
“C”.
Image 5: High-pass Filter
Bypass - Jumper is set to
“D”. Not recommended.
Jumper Settings for “JP1”

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Image 5: Use the provided solid core
wire to wrap around the cables and pass
through from the rear of the chassis to
the front.
Image 7: Pull the cables towards the
front of the unit.
Image 6: When installing the BAD4M
into the B80 Chassis, make sure the
metal Daughter Card backplate (not the
PCB) is inserted into the card guides.
(BDA4M shown here)
Image 8: Attach the 4-pin connectors
(1/2 is on the top, 3/4 is on the bottom)
and the ribbon cable to the front panel.
Attach the front panel to the chassis us-
ing two thumb screws.
Image 9: With the B16 cover removed,
install the BAD4M into the card guides as
shown (BDA4M shown here). Make sure
the metal Daughter Card backplate, not
PCB, is inserted into the card guides.
Image 10: Pull the cables through to the
front of the chassis. Attach the 4-pin
connectors (1/2 is on the left, 3/4 is on
the right) and the ribbon cable to the
front panel. Attach the front panel to the
chassis using two thumb screws.
Installing B80 Mothership Daughter Cards
Installing B16 Mothership Daughter Cards
*NOTE- See B80 Mothership Quick Start Guide for more information
*NOTE- See B16 Mothership Quick Start Guide for more information

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Image 11: BAD4M Front Panel Image 12: BAD4M Rear Panel
See the table below for maximum analog input at each level setting:
Front Panel: Rear Panel:
BAD4M Analog Input Switch and Level Attenuation

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Image 14: BAD4M-1114, utilizing BOPA11 on chan-
nels 1/2, and BOPA14 on channels 3/4.
Image 13: BAD4M-1414, utilizing BOPA14’s on all
channels.
BAD4M Op-amp Conguration
The BAD4M Daughter Card can be customized with four channels of the BOPA14,
four channels of the BOPA11, or two channels of each op-amp.
The BOPA11 is ideal for mastering, with maximum clarity, detail, and minimal dis-
tortion. The BOPA14, which was initially designed for the BDA8, has a slightly more
pleasing tone and is preferred for mix down.