Wohler AVMFlex-SA Series User guide

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AVMFlex58W Series
•
AVMFlex58W-SA
• AVMFlex58W-LP2S
1RU Audio/Video Monitors
User Guide
Part Number 821702, Revision B
the video division of
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AVMFlex58W Series
User Guide
Introduction
Overview
The AVMFlex58W Series includes two types of monitors:
• AVMFlex58W-LPS2 (Analog)
• AVMFlex58W-SA (Analog and SD-SDI)
Both units feature one 5.8" looped CVBS video monitor with flexible
VPOD (video peripheral outboard display) gooseneck LCD system and
2-channels, audio monitoring and metering.
Topics
Topics
Introduction
Page
1
Safety Instructions
2
Unpacking and Installation Recommendations
3
Features
4
Specifications
6
Front Panel
9
Rear Panel
12
Audio and Metering
18
Video and VPOD Features
22
Technical Functional Overview
22
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AVMFlex58W Series User Guide
S a f e t y I n s tr u c ti o n s
Safety Instructions
IMPORTANT:
1.
Read, keep, and follow all of these instructions; heed all warnings.
2.
Do not use this equipment near water.
3.
Use only a dry cloth to clean the equipment.
4.
Do not block any ventilation openings. Install only in accordance
with the instructions in the section entitled, “Unpacking and
Installation Recommendations” on page 3.
5.
Do not install near any heat source such as a radiator, heat register,
amplifier, or stove.
6.
Do not expose the equipment to rain or moisture.
7.
Do not attempt to plug the unit into a two-blade outlet (with only
two prongs of equal width).
By design, these monitors will only plug into a three-prong outlet for
your safety. If the plug does not fit into your outlet, contact an
electrician to replace the obsolete outlet.
8.
Protect the power cord from being walked on or pinched,
particularly at plug’s source on the equipment and at the socket.
9.
Use only the attachments/accessories specified by the
manufacturer.
10. Unplug the equipment during lightning storms or when unused
for long periods of time.
11. Refer all servicing to qualified service personnel. Servicing will be
required under all of the following conditions:
2
•
The equipment has been damaged in any way, such as when
the power-supply cord or plug is damaged.
•
Liquid had been spilled or objects have fallen onto the
equipment.
•
The equipment has been exposed to rain or moisture.
•
The equipment does not operate normally.
•
The equipment has been dropped.
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AVMFlex58W Series User Guide
U n p a c k i n g a n d I n s t a l l a t i o n R e c o m me n d a t io n s
Unpacking and Installation
Recommendations
Unpacking
Unpack the AVMFlex58W Series unit from the shipping container and
inspect all articles for shipping damage. If you find any damage, notify
the shipping carrier immediately for claims adjustments. Compare the
shipping box contents to the packing slip. Contact a PANORAMA sales
representative if there are any unexplained shortages.
Mounting
The unit is designed to install into a standard 19" rack mounted at eye
level for best visual observation of the monitor screens. The
AVMFlex58W Series unit rack mounts in a standard EIA-310-D
specification 19”/483mm rack and needs 1RU of space. Allow sufficient
space at the unit rear for connector and cable clearance (approximately
4”/102 mm). The AVMFlex58W Series unit rack mounts from the front
panel support rails. Rear support is not required.
Heat Dissipation
The ambient temperature inside the mounting enclosure should not
exceed 40° Celsius (104° Fahrenheit). Adjacent devices can be rack
mounted (or stacked) in proximity to the unit if the above temperature
is not exceeded. Allow a 1RU (1.75”/44.45mm) space above and below
the unit for air circulation.
CAUTION!
In products featuring an audio amplifier and speakers, the surface at the side
of the unit, where the audio amplifier heat sink is internally attached, may get
very hot after extended operation. When operating the unit exercise caution
when touching this surface and ensure that external materials which may be
adversely affected by heat are not in contact with it.
Power
The unit comes with a standard 24VDC/3.0A internal power supply
and connects an A/C mains power source (65W, 100 to 240 VAC, 50/
60Hz) to the IEC connector provided on the rear panel of the unit.
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AVMFlex58W Series User Guide
Features
Audio Connections
Connection of the audio feeds is straightforward. Please refer to the
system interconnect block diagram (Figure 1–13 on page 23) for
clarification of the general signal paths into and out of the AVMFlex58W
Series units.
Cable Recommendations
Recommended cable type for analog video signals is: Belden 8281, Belden
1694A, or equivalent. Recommended cable type for analog audio signals
is: Belden 9451 or equivalent.
Sympathetic Vibration
Sympathetic vibration from other equipment (cables, etc.,) in the rack
may be serious enough to interfere with the unit’s sound quality out in
the listening area. The use of thin card stock and/or felt or foam weatherstripping type materials between adjacent vibrating surfaces, or tying up
loose cables, etc., may be required to stop vibrations external to the unit.
Features
The AVMFlex58W Series of audio/video monitors provide the
capability to monitor CVBS video on a LCD display with full-fidelity
stereo audio monitoring in a single rack space (1U). The AVMFlex58W
Series models feature a VPOD LCD video display module mounted to
the front panel via a flexible gooseneck allowing for extensive control of
the viewing angle.
All models in the AVMFlex58W Series contain four high performance
speakers driven by three power amplifiers: two amplifier/driver
combinations handle midrange and high frequency information in
stereo, while the third center channel reproduces information below the
500 Hz crossover point. Output limiter circuits are incorporated to
protect the speakers.
The VPOD LCD Video Display is 5.8" (16:9), LCD size and features
controls for aspect ratio, color, tint/hue (NTSC only), and brightness.
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AVMFlex58W Series User Guide
Features
The display also has a power LED of its own and a bi-color (red/green)
tally indication LED.
All AVMFlex58W Series models come equipped with two 10-segment
tri-color (red/amber/green) LED bar graph display level meters,
separate volume and balance controls, a power indication LED,
headphone output, and a unique LED display, which visually shows
phase (polarity) relationships of the signals selected for monitoring.
Extensive magnetic shielding allows placement immediately adjacent
to video monitors with no color impurities.
The AVMFlex58W Series rear panels are each configured with two
video and audio sources linked by a IN A/IN B switch on the VPOD
video display module for simple A/V monitor switching.
The AVMFlex58W-LP2S has two CVBS analog video BNC inputs and
two stereo analog audio XLR input pairs. The audio and video sources
are linked so that the IN A/IN B switch selects between video A and
audio A or video B and audio B. It also includes CVBS looped outputs.
The AVMFlex58W-SA has one CVBS analog video BNC input, one
stereo analog audio XLR input pair, one SD-SDI video stream, and one
of four de-embedded SDI audio pairs as the sources. The audio and
video sources are linked to that the IN A/IN B switch selects between
CVBS video and analog audio, or SDI video and SDI audio. CVBS video
has a BNC loop output. The monitor also provides an analog output
converted from the selected SDI pair.
Common features of the rack-mounted monitor:
• Bi-amp sum amplification through high/mid and woofer speakers
• DB-25 connector on rear panel provided for tally connections
• A selectable analog audio stereo input on a balanced 3-pin XLR
connector
• Balanced analog output of selected audio source on two 3-pin XLR
connectors
• Two 10-segment tri-color (green/amber/red) LED bar graph display
audio level meters
• Phase indication LEDs for selected audio source
• 98 dB SPL at two feet
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AVMFlex58W Series User Guide
S p e c if i c a ti o n s
• Excellent high frequency response for positive detection of
background whine and noise
• Thorough magnetic shielding for placement next to video monitors
• Separate volume and balance controls
• Headphone output
Common features of the VPOD module:
• Large LCD video display for a space-saving 1RU
• 5.8" (16:9) LCD video display with a 4:3 aspect ratio switch
• Flexible gooseneck mounting of video display allows adjustable viewing
angle in all directions
• A/B switch for selection of one of two linked video and analog audio
sources
• Adjustment for color, tint/hue (NTSC only), and brightness
• Dual color (red/green) tally indication LED *Power indication LED
• NTSC/PAL format
Specifications
Table 1–1 below lists the specifications for both models.
Table 1–1
Monitor Specifications (Both Models)
Specification
Audio Inputs
Audio Input Impedance
6
LP2S (Analog) Values
2 Pair Line 3-Pin XLR-F
>40k Ω, balanced
SA (Analog/SD-SDI)
Values
1 Pair Line 3-Pin XLR-F
SDI Embedded
Line >40k Ω, balanced
SDI: 75 Ω, unbalanced
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AVMFlex58W Series User Guide
S p e ci f i c a t i o n s
Table 1–1
Monitor Specifications (Both Models) (Continued)
Specification
Audio Outputs
Peak Acoustic Output
Frequency Response
(1/6 Octave)
LP2S (Analog) Values
2 XLR-M balanced
(selected source)
SA (Analog/SD-SDI)
Values
Line Output of Selected:
2 XLR-M
Line Output from SDI:
2 XLR-M
98dB SPL medium @2 feet
80 Hz to 20 Hz (± 5 dB) (-10 dB @ 50 Hz, 22 kHz)
RMS each side = 5W, 7W peak
RMS dual woofer = 11W, 16W peak
Electrical Distortion
<0.15% @ any level below input threshold
Hum and Noise
Better than -68 dB below full output
CVBS (Composite Analog)
Video Input Format
1 V peak to peak
SDI video (with embedded
audio) SMPTE 259M
1 CVBS BNC (B Input)
Video Input Connectors
2 CVBS BNC
1 SDI BNC (A Input)
CVBS: 75 Ω, selectable
Video Input Termination CVBS: 75 Ω, selectable
SDI: 75 Ω
1 CVBS BNC
(passive loop-through)
2 CVBS BNC
Video Output Connectors
1 SDI re-clocked output
(passive loop-through)
1 CVBS BNC
(from SDI input)
Video Display Modes
NTSC/PAL
Video Display Type
Active Matrix TFT-LCD
Video Picture Controls
Brightness, color, and tint (NTSC only)
Video Color
RGB delta
Configuration
Magnetic Shielding
<1 gauss any adjacent surface
Power Supply
Internal 100 to 240 VAC, 50-60 Hz
Power Consumption
20 Watts typical, 30W Max 22 Watts typical, 32W Max
Dimension (h x w x d)
1.75 x 19 x 10 inches 44.5x 483 x 254 mm
(chassis only)
Weight (chassis only)
9.5 lbs. (4.3 kg) w/ 6.8 VPOD
Power Output
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AVMFlex58W Series User Guide
S p e c if i c a ti o n s
Table 1–2 lists the information specific to the AVMFlex58W-SA.
Table 1–2
AVMFlex-58W-SA Series SDI
Specifications
Specification
SDI Input Characteristics
Receiver Type
Sensitivity Performance
Input Formats
Audio Sampling Rate
SDI Output Type
SDI Output
SDI Output Level
Maximum of Analog
Output
THD (Full Output)
D to A Gain Calibration,
(dB=dBFS)
SDI Lock Indication
Values
75 Ω (BNC), AC coupled, 15 dB minimum
return loss, 10 to 270 MHz
Auto equalizing, re-clocked
Tolerates cable loss of at least 30 dB
@ 135 MHz
Component, either 525 or 625 lines with
48 KHz audio
48 KHz
Re-clocked copy of SDI input
(equalized and scrambled NRZI)
400 to 700 ps
750 to 850 mV
±24 dBv (0dBv=0.775 vRMS)
<0.008%
±8=-20, ±4=20, ±6=-9, 0=-18
(dip switch selectable)
Red LED:
Off=Not Locked
Red=Locked
Table 1–3 lists the specifications for the video monitor for both models.
Table 1–3
VPOD Video Specifications (Both Models)
Specification
8
Values
Screen Size (diagonal inches)
5.8'
Active Area (H x V, mm)
LCD Aspect Ratio
Resolution (dots x lines)
127.2 x 71.84
16:9
1200 x 234
Dot Pitch (mm)
0.106 x 0.307
Contrast Ratio
Brightness (NITs)
Viewing Angle (top/bottom/left/right)
Weight (VPOD module w/mount)
Power Consumption (Watts, VPOD
Height x Width x Depth
350:1
350
30/60/60/60
1.25lbs.
7W
4.4 x 6.4 x 1.22”
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AVMFlex58W Series User Guide
Front Panel
Table 1–4
Level Meter Specifications
Specification
Value
Level Calibration
-6, 0, +4, +8 dBv, Selectable
Frequency Response
20 Hz to 18 kHz (±0.5 dB)
Level Meter Type
10-segment LED Bar graph Display
LED Colors
Tricolor (red, amber, green)
Metering Range
23 dB
Bar graph Length
2.00" (50.8 mm)
LED Segment Size
0.152" x 0.305" (3.56 x 7.75 mm)
LED Segment Pitch
0.20" (5.08 mm)
Segment Brightness
5.5 mcd (= 20 mA)
Segment Brightness,
<8% difference between segments
Uniformity
Adjacent Segment “Off”
<1% of brightness of active segment
Brightness
Peak Emission Wavelength green: 570 nm red: 630 nm
Display Mode (Ballistics)
VU or PPM, Selectable
VU Characteristics
300 millisecond to 99% of full
Rise Time
indication
Decay Time
300 millisecond
PPM Characteristics
Attack Time
10 milliseconds
Decay Time
2 seconds, 0 to -20 dB
Note:
Features and specifications subject to improvement without
notice.
Front Panel
Common Controls and Indicators
Speakers: The internal speaker system is comprised of two mid-range
tweeter speakers (left and right) and two woofer speakers (left and
right). The two mid-range speakers reproduce only the mid and high
frequencies, while the two woofer speakers monaurally reproduce the
low frequencies.
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AVMFlex58W Series User Guide
Front Panel
Headphone Jack: Select the headphone audio sources as you would
for the internal speakers. When you plug in headphones, the speakers
will mute. This jack accepts a standard 1/4” phone type stereo plug.
Audio Level Meters: Audio levels are visually displayed via these two
10-segment, tri-color (red, amber, green) LED bar graph display level
meters. The left bar graph monitors Channel A while the right bar
graph monitors Channel B. These meters are able to display signal
levels using either PPM or VU standards as selected via a DIP switch
module accessible by removing the top cover of the unit. See Level
Meter Settings on page 20 for specifications and settings of these
meters.
Volume Control: This controls the loudness of the audio reproduced
by the internal speakers or connected headphone. Clockwise rotation of
this control increases the loudness of the monitored audio in both
Channels 1 and 2.
Balance: This knob adjusts the volume balance between the left and right
speakers.
AVMFlex58W-LP2-Specific Features
Figure 1–1
AVMFlex58W-LP2 Front Panel
Speakers
Audio Level Meters
Headphone Jack
Volume
Balance
Phase Indicators
Tally
Aspect
LCD Screen
Input A/B Select
Signal Type Select
Power
Brightness
Color Saturation
Tint (Hue)
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AVMFlex58W Series User Guide
Front Panel
Phase Indication LEDs: These three LEDs offer instant visual
verification of phase (polarity) conditions in the pair of channels
selected for monitoring in the left/right channel speakers. The two
smaller top and bottom LEDs, labeled + and -, show instantaneous
phase relationships in the signal, while the larger middle LED, labeled
AVG, indicates the average phase condition. The top + LED glows (or
blinks) green when signals are in-phase. The bottom - LED glows (or
blinks) amber for out-of-phase signals. The middle AVG LED indicates
the average phase condition by glowing green for in-phase conditions,
or red for out-of-phase conditions. In general, it is sufficient to regard
the AVG LED (average phase condition) as adequate for proper phase
monitoring. While it is normal for stereo signals to contain some
intermittent instantaneous out-of-phase and in-phase conditions (+
and - small LEDs), a steady red glow of the AVG LED almost always
indicates an out-of-phase alarm condition.
AVMFlex58W-SA-Specific Features
Figure 1–2
AVMFlex58W-SA Front Panel
Speakers
Audio Level Meters
Volume
Headphone Jack
SDI Group Select
Tally
Aspect
LCD Screen Balance
Input A/B Select
Brightness
Signal Type Select
Color Saturation
Power
Tint (Hue)
SDI Group Select Switch: This eight-position rotary switch selects the
SDI Group (G1, G2, G3, or G4) and SDI Subgroups (1, 2, 3, or 4) for the
SDI source. Select the SDI source using the Input A/B on the front of
the VPOD.
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AVMFlex58W Series User Guide
Rear Panel
VPOD
Video signals entering the AVMFlex58W Series unit are monitored
through the VPOD LCD video display. The VPOD module is attached
to the front panel by a length of flexible gooseneck tubing allowing
angle viewing adjustment in all directions.
4:3/16:9 (Switch): Selects the image aspect ratio displayed. The
horizontal axis is narrow for 4:3 and full width for 16:9.
Input A/B (Switch): Pressing the switch up selects input A; pressing it
down selects input B.
PAL/NTSC (Switch): Pressing the switch up selects the PAL signal
type; pressing it down selects the NTSC input type.
Power (Switch and Indicator): Pressing the switch up powers the
video display monitor
TNT (Rotary Knob): Adjusts the video display hue (for NTSC only).
COL (Rotary Knob): Adjusts the video display color saturation.
BRT (Rotary Knob): Adjusts the video display brightness.
Tally (Indicator): This tri-color tally LED glows red, green, or amber,
to indicate tally status associated with the video signal displayed.
Rear Panel
The rear panel connector configuration for the AVMFlex58W-LP2S and
for the AVMFlex58W-SA are shown in Figures 1–4 on page 13 and 1–5
on page 14 respectively.
Common Connectors
Power Connector: Attach the supplied standard IEC-320 power cord
between this connector and mains power (100 - 250VAC, 50/60 Hz).
The front panel Power LED (Item 5, page 10) will glow green to indicate
operating voltages are present.
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AVMFlex58W Series User Guide
Rear Panel
Balanced Audio Out: These two male 3-pin XLR connectors are analog
outputs of the source as selected for the left and right speakers. See the
diagram below for pin out information for these connectors.
Figure 1–3
XLR Pin Outs
Female
Male
Tally (DB-25): This 25-pin sub-miniature connector allows you to
control the tally light on the front of the VPOD. For more information
about this connector and how it functions, refer to Tally Control on
page 15.
AVMFlex58W-LP2S Rear Panel
Figure 1–4
Power Connector
Termination
CVBS In and Loop Out A and B
AVMFlex58W-LP2S Rear Panel
Tally
Balanced Audio Balanced Audio Balanced Audio
B In
Out
A In
Termination: Each switch in this two-section DIP module is used to set
the termination characteristics for the CVBS input connector next to it.
If a CVBS loop connector is connected to downstream equipment, set
the appropriate switch to the up position (Unterminate). If no
downstream equipment is connected, then set to the down position
(Terminate).
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AVMFlex58W Series User Guide
Rear Panel
CVBS In A and B: Each of these two female BNC connectors (CVBS A,
IN and CVBS B, IN) accept standard CVBS (Composite Analog) video
signals and are configured for 75 Ω impedance connections. Note that
video input selection is linked to the audio input selection.
CVBS Loop Out A and B: Each of the two loop output connectors
(CVBS A and CVBS B) provide passive signal-through connections
from the associated CVBS IN connector to down-stream equipment.
Note that these outputs function even if power to the AVMFlex58W
unit is turned off.
Balanced Audio In A and B: These female XLR connectors accept
standard analog audio signals and are configured for 40K Ω impedance
connections. Left and Right inputs are provided in each of the two
input sections (Balanced In A and Balanced In B). Note that audio input
selection is linked to the video input selection.
AVMFlex58W-SA Rear Panel
Figure 1–5
Power Connector
Tally
AVMFlex58W-SA Rear Panel
SDI In
CVBS In
Balanced Analog Audio In
RS232
CVBS Loop Out
SDI Out
Selected Balanced Analog Audio Out
Digital Gain Calibration
Analog Audio Out from SDI
SDI/CVBS Out
RS233 (DB-9): This connector is used for uploading software upgrades
into the 910935 audio/video demux board.
Digital Gain Calibration (Dip Switch): You can set the SDI input gain
calibration (the analog level that corresponds to a given digital input
value) using this two-position dip switch. The factory setting is +4 dB
(analog) = -20 dBFS (digital). See Figure 1–1 on page 10 for details.
SDI Input (BNC-F): The SDI input receives standard audio/video
embedded SDI signals and can be configured for an unbalanced 75 Ω
connection. Use the SDI Group Select switch (SA only) and
subgroups to monitor. To monitor this input, you must set the Input
A/B switch to A.
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AVMFlex58W Series User Guide
Rear Panel
SDI Output (BNC-F): The SDI output connector outputs a reclocked
(regenerated) copy of the of the signal entering the SDI input connector
and is configured for an unbalanced 75 Ω connection. This output
functions regardless of other selection settings so that the reclocked
output can remain independent of the unit’s other monitoring
functions (as long as a valid SDI source is present on the SDI input).
SDI/CVBS Out (BNC-F): CVBS video signal converted from SD-SDI
video. Active as long as SDI video is present.
CVBS In: Much like CVBS In B on LP2S model.
Tally Control
The VPOD LCD display module provides a dual-color tally indication
LED accessed by the tally control connector located on the chassis rear
panel. The tally indicator LED is capable of displaying three colors: red,
green, and amber. Illuminating the red or green LED separately will
result in that tally color. Illuminating the red and green LEDs
simultaneously creates the amber color. For tally control connector pin
out functions, see Table 1–5 on page 17 below.
Two examples of tally connection configurations are shown in Figure3b, below. You can operate the Tally Indication LED by numerous
methods. The two tutorial examples showing isolated and non-isolated
activation are illustrated to show basic operation. Although switches
are employed in these examples, the LEDs interface with TTL levels.
You can design illumination circuits as shown, by using TTL buffers, or
by using transistors as switches.
Isolated
Operating the Tally Indication LED in an isolated configuration
requires an external (customer provided) power supply and tally
system. If your facility currently has a tally system with companion
power source, use this method to integrate the AVMFlex58W Series
tally with your existing tally matrix.
Note:
Ensure the LED power supply provides +5 to +12VDC.
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AVMFlex58W Series User Guide
Rear Panel
Figure 1–6
Isolated (External Power) Tally Closure
Circuit
Non-Isolated
Operating the Tally Indication LED in the non-isolated configuration
uses the AVMFlex58W Series internal power supply to provide the
tally LED voltage. Connect your tally closures to the respective
AVMFlex58W tally connections.
Figure 1–7
16
DB25 Pin Female Sub-Miniature D
Connector Pin Out
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AVMFlex58W Series User Guide
Rear Panel
Table 1–5
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
AVMFlex58W Series Tally Connector Pin
Functions
Function
+12VDC (Current Limited)
Red Anode
Green Anode
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
Chassis Ground
R/G Common Cathode
Chassis Ground
Chassis Ground
N/C
Chassis Ground
Chassis Ground
N/C
Chassis Ground
Chassis Ground
N/C
Chassis Ground
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AVMFlex58W Series User Guide
Audio and Metering
Figure 1–8
Non-Isolated (Internal Power) Tally
Closure Circuit
Audio and Metering
Both AVMFlex58W Series models contain high performance
loudspeakers transducers driven by three power amplifiers; two
amplifier/driver combinations handle midrange and high frequency
information in the left and right (stereo) speaker channels, while the
third amplifier channel sums the left and right channel information
below the 500 Hz crossover point in the woofer (bass) speaker(s). Note
that the woofer channel is not a dedicated LFE or center channel.
Speaker Configuration
The 1U rack size AVMFlex58W Series products are configured with
two speakers (left and right) to reproduce mid- and high-range audio
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AVMFlex58W Series User Guide
Audio and Metering
frequencies (in stereo), but feature two woofer speakers to reproduce
the summed (combined) low-range audio frequencies from the left and
right speaker input channels. It should be noted that both woofer
speakers, which are wired in series, are driven from one woofer
speaker channel, and are not stereo.
See the simplified diagram below for a block diagram of the
AVMFlex58W Series audio amplifier/speaker configuration.
Figure 1–9
AVMFlex58W Series Audio Amplifier
And Speaker Block Diagram
Left
Speaker
Input A
(Left)
EQ
Limiter
High-Pass
Left Speaker
Channel
Amplifier A
Woofer
Speaker
Volume/
Balance
(VCO)
Lo-Freq
Amplifier
Sum
Low-Pass
Limiter
Input B
(Right)
Woofer Speaker
Channel
Woofer
Speaker
Right
Speaker
EQ
Limiter
High-Pass
Right Speaker
Channel
Amplifier B
AVMFlex Series (1U) Audio Amplifier and Speaker Block Diagram
Balance Control Characteristics
The balance control attenuates the signal from the source, so that the
left and right bass frequencies (summed together and reproduced in the
woofer channel) will also respond to the balance control.
Example:
The following example demonstrates how the inputs are routed and
the frequencies of the speakers.
If an audio signal of a voice speaking English is fed to the A (left) input
and a voice speaking Spanish is fed to the B (right) input, then the left
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AVMFlex58W Series User Guide
Audio and Metering
speaker channel will reproduce the mid-range and high-range
frequencies of the English speaking voice, the right speaker channel
will reproduce the mid-range and high-range frequencies of the
Spanish speaking voice, and the woofer speaker channel will reproduce
the summed (combined) low-range frequencies of both voices.
If the balance control is panned to the left, then the Spanish speaking
voice in the right speaker channel will diminish in volume, the Spanish
speaking voice in the woofer speaker channel will also diminish, and
the English speaking voice in both the right speaker channel and
woofer speaker channel will increase slightly (to maintain overall
output level). The converse is true if the balance control is panned to
the right. See Figure 1–9 on page 19 for placement of the balance control
in the audio amplifier circuit.
Level Meter Settings
Level Meter DIP Switch Location
Two DIP switch modules allow the user to set the level meter parameters
independently for each of the two bar graph displays. These DIP switches
are accessible by removing the top cover of the unit and are located on
two PCBs installed at right angles to the front panel where the level
meters are installed. The DIP switches face upwards for easy adjustment.
There are four sections (1, 2, 3, 4) on each DIP switch module. The first
two sections (1 and 2) are for setting the meter input gain calibration
and the second two sections (3 and 4) are for setting the bar graph
display mode.
Meter Input Gain Calibration Settings
DIP switch sections 1 and 2 set the meter input gain calibration, which
determines the level of the input signal that will result in a zero reading
on the meter bar graph’s. The factory setting is +4 dBu, but can instead
be set for -6 dBu, 0 dBu, or +8 dBu by the user. See Figure 1–10 on page
21 for settings.
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AVMFlex58W Series User Guide
Audio and Metering
Figure 1–10
-6 dBu
Figure 1–11
Analog Gain Calibration Settings
0 dBu
+4 dBu
PPM
VU Peak
+8 dBu
Digital Gain Calibration Settings (SA)
Bar Graph Display Modes
DIP switch sections 3 and 4 determine how peak levels are displayed
(display mode) and select either the PPM mode or an auto-reset VU peak
mode (not the PPM value). The PPM mode exhibits an attack time of 10
milliseconds and a decay time of 2 seconds from 0 to -20 dB. The VU
mode exhibits a 300 millisecond rise to 99% of full indication and a decay
of 300 milliseconds. The factory setting is VU mode. See the diagram
below for settings.
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AVMFlex58W Series User Guide
Technical Functional Overview
Video and VPOD Features
The VPOD LCD display module may be adjusted for two lengths (1.3"
and 2.25") by changing the location of two screws on the bottom of the
chassis which are lined up with the VPOD module. See Figure 1–12
below.
Figure 1–12
Caution:
VPOD Gooseneck Adjustment
1.
Locate the adjustment holes on the bottom of the main chassis that
correspond with the VPOD module.
2.
Remove the two (2) installed screws and set aside for later use.
3.
Carefully pull or push the VPOD module until the two holes of the
internal gooseneck mount line up with the appropriate two holes in
the chassis bottom. Ensure that the LCD display screen is not
touched or otherwise damaged during this operation.
4.
Reinstall the two screws removed in step 2 into the new position.
Do not rotate (twist) the VPOD module around the gooseneck axis; the
torque may damage the gooseneck and/or internal wiring. Also, avoid
touching the LCD video screen itself with the fingers or other objects.
Technical Functional Overview
Figure 1–13 on page 23 illustrates theAVMFlex58W functionality.
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AVMFlex58W Series User Guide
T e c h n i c al F u n c ti o n al O v e r v ie w
Figure 1–13
AVMFlex58W Series Block Diagram
Rear
Panel
POWER
A/B Switch
A
IN
CVBS A
A
LOOP
1 2
UNTERM
TERM
Termination Select
Video In
Tally Indication
Video I/O Switch PCB
910209
LOOP
Balanced
Input A
COL
Video Display
CNT
IN
13
Volume
14
LEFT
A
RIGHT
B
TALLY
VPOD-40
LED
1
25
VPOD
Video
Display
Module
TNT
BRT
B
CVBS B
TALLY
B
I/P
Balance
Headphone
Output PCB
910904
Left
Woofer
LEFT
L
L
Left
Speaker
Audio Amplifier PCB
919209
LEFT
A
Balanced
Input B
RIGHT
B
RIGHT
1
3
LEFT
2
Right
Speaker
R
Left
Bargraph
Driver PCB
919234L
L
Right
Bargraph
Driver PCB
919017R
R
Phase
Indication
PCB
919084
Right
Woofer
)+
1
Balanced
Output
R
3
RIGHT
2
Audio I/O Switch PCB
910234
Rear
Panel
3
2
1
0
1
3
5
7
10
20
Level
Meters
AVM-Flex Block Diagram
1
3
2
1
0
1
3
5
7
10
20
AVG
Phase
Indication
)
2
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01/14/04 Rev-A
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