Contemporary Research 232-ATSC 4K User manual

Page | 1 232-ATSC 4K HDTV Tuner Product Manual 072020
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Product Manual

Page | 2 232-ATSC 4K HDTV Tuner Product Manual 072020
Contents
Overview...............................................................................................................................................................................................3
Installing the 232-ATSC 4K....................................................................................................................................................................4
Setup.....................................................................................................................................................................................................4
Front Panel Setup Menus.....................................................................................................................................................................5
Front-Panel Button Sequences.............................................................................................................................................................6
Setup Notes ..........................................................................................................................................................................................6
Web Pages............................................................................................................................................................................................8
HD2-RC IR Remote..............................................................................................................................................................................10
RS-232/Telnet/UDP Control Protocol.................................................................................................................................................11
Control Commands.............................................................................................................................................................................12
Response Strings.................................................................................................................................................................................15
RS-232 Cable Connections..................................................................................................................................................................17
On-Screen Menus...............................................................................................................................................................................18
RKU Universal Rack Mount Kit............................................................................................................................................................22
Specifications......................................................................................................................................................................................23
Safety Instructions and Warranty.......................................................................................................................................................25

Page | 3 232-ATSC 4K HDTV Tuner Product Manual 072020
Overview
The 232-ATSC 4K HDTV Tuner, our 5th-generation ATSC HDTV tuner, adds new capabilities to the industry-standard 232-ATSC series. New
features include decoding H.264 programs up to 1080p, output scaling up to 4K, and IPTV output stream. The tuner is fully compatible with
control commands for previous models.
The integrator-friendly HDTV tuner is controllable via 2-way RS-232, IP Telnet and UDP, as well as wireless and wired IR commands. Onboard
Web pages enable remote configuration, control, and monitoring from a web browser.
A full-featured, commercial grade HDTV tuner, the 232-ATSC 4K can receive both analog and digital MPEG-2/H.264 channels, in ATSC, NTSC,
and clear QAM formats. Using an optional RF-AB switch, the tuner can switch between antenna and cable feeds.
Features
Tuning
•ATSC air and Clear QAM cable channels
•NTSC analog air and cable channels
•Air channels 2-69
•Cable channels 2-135, Standard, HRC, and IRC
Decoding
•MPEG-2 or H.264 digital channels
•Supports AC-3, MPEG-1 Layer 2, or AAC audio formats
•Supports multiple audio programs
Video
•HDMI Type A, Version 1.4b
•Analog component RCA and HD15 RGBHV (VGA) outputs, selectable YPbPr or RGB
•Analog composite video output
•Output scaling to 480i, 720p, 1080i, 1080p, 2160p or Auto
Audio
•HDMI embedded AC-3 pass-through, PCM Fixed, or PCM Variable
•SPDIF coaxial and optical AC3 pass-through, PCM Fixed, or PCM Variable
•Variable Analog stereo
Closed Captions
•Decodes analog and digital closed captioning
•Caption data available as Line 21 closed caption data on composite video output
Setup and Control
•Control via front panel, optional IR remote, on-board web pages, or RS-232 commands
•Two-way control via RS-232, Telnet, or UDP for use with third-party control systems.
•RS-232 can be daisy-chained to control up to 9 tuners from a single RS-232 port
•CEC control available on HDMI output for most CEC enabled displays.
•Setup via Front panel menu, On-screen menu, web pages, or RS-232 commands.
•Firmware updateable over Ethernet with CR Toolbox software
IPTV Output
•Passes through IPTV stream from received digital channel
•Stream all programs, individual program, or tuned program

Page | 4 232-ATSC 4K HDTV Tuner Product Manual 072020
Installing the 232-ATSC 4K
The 232-ATSC 4k may be placed freestanding on a suitable surface or installed in a standard EIA 19” equipment rack with the included RKU
rack mount hardware. The RKU rack mount hardware kit facilitates mounting of a single tuner in one rack space or two tuners side by side in
a single rack space.
Connect the HDMI output or other available output to a video display, video matrix/router input, or video encoder input. Analog and SPDIF
digital audio outputs are available for connection to an amplifier, audio system processor, or other compatible audio input. Connect a coaxial
cable from the CATV or antenna source to the Air/Cable input. The 232-ATSC 4K will need to be connected to an appropriate mains power
source using the included external power supply or equivalent.
After the 232-ATSC 4K is connected, a channel scan will need to be performed prior to viewing programs. The channel scan may be initiated
from the on-screen menu, front panel setup menu, RS-232 command, or web page.
Setup
Multiple methods are available to access control functions and configuration settings for the 232-ATSC 4K:
Front Panel
For normal operation, the Up/Down buttons step through the channels in the channel memory. Left/Right buttons are used to control the
variable audio output level.
Front Panel Menu
Configuration settings for AV setup, System setup and Network setup are available on the front panel LCD display.
•Press the red SETUP button to access the front-panel menus
•Press the Left/Right arrows to step through each configuration menu category
•Press SELECT to enter the menu
•Press the Up/Down arrows to view the settings
•Press the Left/Right arrows to step through the setting options
•Press SELECT to save the changes for each menu
•Press SETUP to back out of a menu or exit configuration settings
On-Screen Menu
Many of the common AV settings can be configured in the on-screen menu. Buttons on the front panel or HD2-RC handheld remote may be
used.
•Press MENU to bring up the on-screen menu
•Press Up/Down to step through each menu category
•Press SELECT to enter the menu
•Press the Up/Down arrows to view the settings
•Press SELECT to select a setting
•Press MENU to back out of a menu or exit the on-screen menu
Web Pages
On board web pages are available control and configuration. Connect the ethernet port of the 232-ATSC 4K to a PC. A crossover cable is not
required. Open a web browser in the PC and enter the IP address of the 232-ATSC 4K into the address bar to access the web pages.
RS-232 Control
The 232-ATSC 4K may be controlled and configured using RS-232 ASCII strings from a terminal program or control system processer.
Connection to the unit for RS-232 communication can be through the DB-9 connector on the rear panel, the front panel USB virtual serial
port, Telnet, or UDP.
Up to nine individual tuners may be controlled using one RS-232 serial port in a control system processor. Each tuner will need to be
configured with a unique unit number. A daisy chain serial cable will be required.

Page | 5 232-ATSC 4K HDTV Tuner Product Manual 072020
Front Panel Setup Menus
A/V Setup
Factory Defaults settings are shown in Bold .
HD Output
Select RGBHV or YPbPr for analog HD output. This also sets color space for HDMI.
HDMI and analog HD video outputs are always active.
HD Res
Sets the output resolution from 480i to 2160p or Auto (Native resolution).
Tune Mode
Select CATV | Air | IRC | HRC | CATV Auto
RefreshRate
59.94 | 60 Hz for 1080i and 720p 1080p and 2160p are fixed at 60 Hz.
Digital Audio
PCM | PCM Variable | AC-3
Captions
On | Off
ACap Mode
CC1 | CC2 | CC3 | CC4 | Text1 | Text2 | Text3 | Text4
Dcap Mode
Service 1 | Service 2 | Service 3 | Service 4 | Service 5 | Service 6
Scan Mode
Analog+Digital standard full scan
Digital–Delete Analog scan for digital, delete any analog channels
Digital–Keep Analog scan for digital, but keep all analog channels
Analog–Delete Digital scan for analog, delete any digital channels
Analog–Keep Digital scan for analog, but keep all digital channels
Channel Scan
Press SELECT to start scanning. No LCD text or feedback will be displayed to confirm that the scanning
is in progress. The on-screen menu will display a list of channels as they are found. The tuner scans analog
channels first, then digital.
Press SELECT to skip the analog scan.
Overscan
0 –9 Selects percentage of overscan for video output.
HDMI-DVI
Auto | HDMI | DVI DVI does not hot-patch, may need to reboot tuner in DVI mode.
HDMI Audio
On | Off
AC3 Cmpr
Line | RF Compression mode for AC-3 downmix to stereo (RF enhances dialog).
System Setup
Baud Rate
1200 | 2400 | 4800 | 9600 | 19200 | 38400 | 115K | 230K
Unit Number
1 –9 For RS-232 daisy chain operation.
Panel Lockout
None | Ch+Menu | Vol+Menu | Ch+Vol+Menu | Power | Setup | Menu | All | Setup+Menu | Pwr+Setup+Menu
Backlight
1–10
LCD Contrast
1–10
IR Receive
IR On | IR Off
CEC Mode
Disable | Turn Display On | Turn Display On/Off
Firmware
Right or Left arrow scrolls through firmware versions and displays power supply voltage.
Example:
232-ATSC4K_V1.04a—ControlFirmware
BL Ver V0.11C —Bootloader Firmware
HD Version 7.08 —HDFirmware
Volt in = 11.8
Network Setup
IP Address
192.168.1.231
IP Mode
Static | DHCP IP address, gateway, and subnet cannot be changed in DHCP mode.
IP Gateway
192.168.1.1
Subnet Mask
255.255.255.0
IP Port
23 Telnet port
MAC/SN
00:14:C8:14: xx:xx
UDP Reply
On | Off
IPTV Setup
Enable
On | Off
DestAddr
xxx.xxx.xxx.xxx Address may be unicast or multicast
DestPort
1-65534
Program
All, Tuned, or select from available programs

Page | 6 232-ATSC 4K HDTV Tuner Product Manual 072020
Front-Panel Button Sequences
Air/Cable Tuning
Pressing the Up and Down keys toggles air/cable tuning.
Audio Mute
Pressing the Left and Right keys toggles mute on/off.
Unlock Front Panel
If the Setup key is locked out, pressing Setup and the Right key will unlock setup until the tuner resets. The tuner will power on if it is off
(even if the Power button is locked).
Factory Reset
Press Power and Up together when at the System: Firmware menu to reset to the default settings.
Display IP Address
Hold Setup to display the IP address on the front panel LCD display.
Display Info Banner
Hold Select to display the on-screen info banner.
Setup Notes
Channel Scan
A channel scan will be required prior to initial use and subsequently following any changes to the received channel line-up. The channel scan
may be initiated in the on-screen setup menu, front panel setup menu, web page, or by RS-232 command. The Air or Cable scan mode
should be selected for the intended application prior to initiating the scan.
Tuning Cable Channels
The 232-ATSC 4K will skip encrypted channels automatically when a channel scan is initiated. Scanning analog channels may be skipped by
pressing Select the front panel or IR remote after the scan has started. Typically, the unencrypted digital cable channels will not use the
same Guide numbers as a cable box.
Air/Cable
The 232-ATSC-4K has separate channel memories for air and cable channels. It is possible to toggle between the two channel memories. A
separate channel scan for each mode will be required. The toggle may be initiated by simultaneously pressing the Up and Down buttons on
the front panel, pressing the A/C button on the IR remote or web page, or RS-232 command.
If the air and cable channels are delivered on two separate coax cables, the accessory RF-AB selector switch may be utilized. The control
cable to the RF-AB selector switch will connect to the A/C jack on the rear panel of the tuner. The input selection of the RF-AB selector switch
will follow the Air/Cable toggle command received by the tuner.
RGB/Component Video
Analog HD output is available on both the HD15 RGBHV (VGA) and Component jacks. The YPbPr/RGB configuration setting applies to both
sets of analog HD outputs. Use the front-panel menu, web page, or RS-232 command to select the desired output mode.
DVI
DVI compatibility is normally supported. Forced DVI may be manually selected from the HDMI-DVI menu setting.
Audio
The volume settings do not affect digital audio in AC-3 or PCM modes. PCM Variable supports volume control. The analog audio outputs
always follow the volume settings. If there is no audio, make sure the volume is all the way up (and not muted). A “motorboat” sound means
the display does not support AC-3, and the mode should be changed to PCM.

Page | 7 232-ATSC 4K HDTV Tuner Product Manual 072020
IR Control
•Interference from room fluorescent lights can cause problems with IR remote operation. If this occurs, the frequency of the IR can
be changed. Hold Select on the remote and press “9” to set the IR frequency at 57 KHz. Hold Select and press “4” to set the IR to the
normal 38 KHz frequency.
•Check the front-panel menu to see if IR Receive is turned on or off.
•If there is significant IR interference, an IR-RXC Remote Sensor may be required. Cover the front-panel IR sensor to reduce
interference.
•The 232-ATSC 4K will respond to a universal remote with the TV type set to Sharp.
Captioning
Embedded Line 21 captioning data is available on the Composite video output. If the tuner is feeding a compatible digital encoder or
encoder/modulator, the Composite video output may be used as the source of the captioning data.
On-screen captioning may be enabled from the on-screen menu, IR remote, web page, or RS-232 commands. For CEA-708 digital captions,
options are available in the on-screen menu for font, color, style, and other appearance settings.
Consumer Electronics Control
Consumer Electronics Control (CEC) is available for use with the HDMI output for power control of compatible displays.
HDMI CEC may be selected for sending power commands to the display. No other control functions are available for CEC control. HDMI CEC
sends standardized control commands over the HDMI cable. CEC functionality is available in many TVs and displays designed for the
consumer market. If control of the TV or display via HDMI CEC is desired, it is important to check the TV or display’s documentation to
determine if CEC is supported.
It is common for manufacturers to use their own unique term to refer to HDMI CEC. For example, Samsung refers to CEC as Anylink. LG
refers to it as SimpLink.
CEC will likely need to be enabled in the display. Some displays will automatically detect that a CEC supported device has been connected
and prompt for confirmation.
Although the industry strives for standardization relating to CEC, it is possible that some or all CEC control communication between the ICC1-
TC and connected display may not function depending on display make and model. In this situation, RS-232 is recommended for reliable
display control.
When enabled, the options are:
•The display will turn on when the tuner receives a power on command, but will not turn off with a tuner power off command
•The power state of the display will follow the power state of the tuner
IPTV Streaming
The 232-ATSC 4K can passthrough the MPEG transport stream of the received digital RF channel as a UDP MPEG-TS IPTV stream via the
Ethernet output. The destination IP address may be a unicast or multicast address. The allowable range for the destination port is 1 to
65534.
For received channels with multiple programs or sub-channels, the output stream may be configured to contain all programs, an individual
program, or the program of tuned digital channel.
For a source RF channel that has multiple programs and the output stream is configured for all programs, the MPTS (multiple program
transport stream) output will include each of the received programs of the original RF broadcast. The entire PSIP (Program and System
Information Protocol) information present in the broadcast will be included unaltered in the IPTV stream.
If an individual program is selected, the SPTS (single program transport stream) will contain an individual program. All the tables in the PSIP
except the PAT (Program Association Table) and PMT (Program Map Table) of the selected program will be stripped from the IPTV stream.

Page | 8 232-ATSC 4K HDTV Tuner Product Manual 072020
Restore Factory Default Settings
The unit may have the configuration restored to the factory default settings. The channel list is not changed as this data is stored in separate
memory.
The factory default settings may be restored using the on-screen text menu. Hold the Menu button to open the on-screen text menu. Select
the System menu and scroll to Firmware. Verify that the System firmware is displayed. Simultaneously press Select and Menu.
The factory default settings may also be restored via the RS-232 command ‘>Z!’. Keep in mind that the RS-232 settings may be changed and
the RS-232 communication will be lost.
Web Pages
The 232-ATSC 4K includes Web pages accessible by any browser over IP. Open a web browser and type in the tuner’s IP address in the
address bar. The tuner’s IP address may be displayed on the front panel by holding down the Setup button. The default IP address is
192.168.1.231.

Page | 9 232-ATSC 4K HDTV Tuner Product Manual 072020

Page | 10 232-ATSC 4K HDTV Tuner Product Manual 072020
HD2-RC IR Remote
The optional HD2-RC IR Remote can be used to setup the tuner and for daily operation. All of the functions on the remote have equivalent
commands in RS-232, Ethernet, and Wired IR formats. In addition, the 232-ATSC 4K front panel buttons are available for Power, Channel,
Volume, Menu, and Select. The tuner will display a “^” symbol in the upper right corner of the front panel display when an IR command is
received.
Power
Press to toggle on and off.
Volume Control
Use the Vol+, Vol- and Mute buttons to control volume.
Channel Selection
Two-part major/minor channel numbers are separated by a –(dash). Example 21-3
One-part channels are accessed by entering the channel numbert digital channels are
Ch+, Ch-and PrevCh can be used to access and recall channels
Menu Operation
Press Menu to access the on-screen menus.
•Use the directional arrows, Select and Exit to navigate the on-screen menus.
•Exit closes the on-screen menu
•Menu reverts to the previous menu or closes the on-screen menu from the Main
Menu
•Enter selects the menu choice
Special Functions
•CC steps through available closed-captioning options
•Audio steps through main and SAP audio options
•Signal launches up on-screen signal strength meter (digital channels only)
•Ratio steps through aspect ratio options.
•Info launches on-screen information banner.
•A/C toggles air or cable tuning
•Fav displays list of favorite channels
•Guide launches on-screen guide, select a program and press Info to display program
information
Some of the Special Function commands may not be available on all channels.
Hold the Select button and press “9” to set the IR frequency to 57 KHz. Hold the Select button
and press “4” to set the IR to the normal 38 KHz frequency.

Page | 11 232-ATSC 4K HDTV Tuner Product Manual 072020
RS-232/Telnet/UDP Control Protocol
The 232-ATSC 4K full duplex RS-232/Telnet protocol enables a system programmer to control all TV Tuner functions as well as monitor TV
Tuner status. All commands are sent as ASCII strings. No delays between characters or commands are required, as data is interrupt driven
and buffered.
Up to nine 232-ATSC 4K units may be cabled together and addressed for individual control from a single RS-232 port. A unique unit number
will need to be assigned to each 232-ATSC 4K tuner.
Communications parameters are 1200 to 230,400 baud, 8 data bits, no parity, and 1 stop bit. Factory default is 9600 baud. All settings are
saved to NVRAM in the 232-ATSC 4K tuner. The tuner will accept non-standard RS-232 control such as voltage that swings from 0 to +5 VDC,
commonly found when IR ports are used to send RS-232 commands.
The same commands can be sent over IP Telnet (up to two sessions) and via UDP to the tuner’s IP address to port 31931 (fixed). UDP
responses are disabled by default. UDP responses may be enabled in the front panel, web page Network Settings menu, or RS-232 command.
Responses will be sent to port 31932 at the broadcast IP address of the tuner’s subnet.
General Protocol Specifications
Characters in command strings to the 232-ATSC 4K are common ASCII keyboard characters. Command strings sent to the 232-ATSC 4K begin
with the ASCII > (greater than symbol) as an ‘Attention’ character and end with carriage return - ASCII CR, Hex $0D, or keyboard Enter - as an
‘End-of-command’ character.
Responses from the 232-ATSC 4K begin with the ASCII < (less than symbol) as an ‘Attention’ character and end with a carriage return followed
by a line feed - ASCII LF or Hex $0A as an ‘End-of-command’ character.
A carriage return is required at the end of each command and is assumed in all examples. The ‘=’ sign for parameters may be omitted if
desired, though it is helpful for clarity in checking programming.
Command String Structure
[Attention] (Unit#) [Command] (Parameters)
[Return] Attention Single character (>) starts the string
Unit# The Unit# is expressed as an ASCII 0-9 when used in multiple tuner applications.
To address all units, use a Unit # of 0
(Zero) No unit number will default to Unit #1
Command A two-character command
Parameters Added attributes to some commands
Return A carriage return ends the command string. ASCII CR, Hex $0D, or keyboard ‘Enter’ may be used in programming. For
simplicity, the programming examples in the manual will not show the ‘CR’.
Command and Status Response
Commands can be sent back-to-back at any time without any delay. To allow for rapid, multiple commands, status responses are intentionally
delayed by about 125mS, sending the most current status in response to control commands or user actions.
String Example
The example below is a command for a channel change to 6-2 followed by the response string.
>TC=6-2
<1TU006Uxx1002x0
The status of a setting may be queried by omitting the = (equals symbol). The following command example queries the overscan percentage
and shows the returned response.
>D4
<1D4=3

Page | 12 232-ATSC 4K HDTV Tuner Product Manual 072020
Control Commands
Code
Function
Operation
Front Panel
P1
Power On
Brings unit out of standby
P0
Power Off
Places unit in standby, mutes audio and video
PT
Power Toggle
Toggles standby mode
S4=
Set Front Panel Lockout Mode
0=None
5=Setup
1=Ch+Menu
6=Menu
2=Vol+Menu
7=All
3=Ch+Vol+Menu
8=Setup+Menu
4=Power
9=Power+Setup+Menu
Press Select and Right key to unlock temporarily
Q5=
Set IR Receive Mode
0=IR receive disabled
1=IR receive enabled
M0=
LCD Backlight
Sets LCD display backlight brightness 1-10
M8=
LCD Contrast
Sets LCD display contrast 1-10
Tuning
TC=
Select Channel
Tunes analog and digital channels, leading zeros OK, up to 4 characters for analog or one‐
part digital channel, 3 characters each for digital two-part major and minor channels.
Examples:
‘>TC=28:1’, ‘>TC=28‐1’ Selects digital channel 28‐1
‘>TC=32’ Selects digital channel 32, analog channel 32 if no digital ‘>TC=32‐0’ Selects analog
channel 32
TU
Tune channel up
Selects next higher channel in channel list
Example: ‘>3TU’ Unit#3 incremented to next highest channel
TD
Tune channel down
Selects next lower channel in channel list
TP
Tune previous channel
Selects previously viewed channel
NC
Channel Name status
Returns channel name as entered in channel list, up to 7 characters
NP
Program Name status
Returns program name, up to 30 characters, 15 additional if non-ASCII characters are
present, such as ñ
T^
Start Channel Scan
Initiates a new channel scan, scan operation set by D0 and S0
S0=
Tuning Format
Sets tuning format for channel scan initiated from T^ command or front panel Setup Menu
0=CATV -Switches to Cable Mode, sets standard channel spacing
1=Off-Air -Switches to Air Mode
2=IRC -Switches to Cable Mode, sets IRC channel spacing
3=HRC -Swichtes to Cable Mode, sets HRC channel spacing
4=Cable Auto -Switches to Cable Mode, auto detects channel spacing
D0=
Analog/Digital scan mode
Sets channel type for channel scan initiated from T^ command or front panel Setup Menu
0=All -Scan for analog and digital channels, delete existing analog and digital channels
(default)
1=Digital -Scan for digital channels only, delete existing analog channels
2=Digital -Scan for digital channels only, keep existing analog channels
3=Analog -Scan for analog channels, delete existing digital channels
4=Analog -Scan for analog channels, keep existing digital channels
XA=
Channel add
XA=<major>,<minor>,<physical> Adds channel to list
Examples:
>XA=38,1,0 adds 38-1, physical channel 0 will be the same as major
>XA=8,0,13 adds virtual channel 8, found on physical channel 13
XD=
Channel delete
XD=<major>,<minor> Removes channel from list

Page | 13 232-ATSC 4K HDTV Tuner Product Manual 072020
Code
Function
Operation
Output
D4=
Overscan
Selects Overscan percentage 0-9
Q0=
Display Closed Captions
0=Captions off
1=Captions on
Q1=
Analog Caption Service
Selects analog caption service 1-8
1=Caption 1
5=Text 1
2=Caption 2
6=Text 2
3=Caption 3
7=Text 3
4=Caption 4
8=Text 4
Q7=
Digital Caption Service
Selects digital caption service 1-6
1=Service 1
4=Service 4
2=Service 2
5=Service 5
3=Service 3
6=Service 6
R6
Refresh Rate
Sets to 59.94 Hz
RM
Refresh Rate
Sets to 60 Hz
KK=149
Output RGB
Sets colorspace to RGB
KK=151
Output YPbPr
Sets colorspace to Component
HD=
HDMI/DVI mode
0=Auto 1=HDMI 2=DVI
Audio
VU
Ramp volume up
Starts volume ramping up
VD
Ramp volume down
Starts volume ramping down
VV
Stop volume ramp
Stops volume ramping
VH=
Sets volume level 0‐100
Volume level, scaled in 100 steps
VL=
Sets volume level 0‐63
Volume level, scaled in 63 steps (compatibility mode)
VM
Volume Mute Enabled
Mutes all audio outputs
VX
Volume Mute Disabled
Restores audio to previous level
VT
Toggle Volume Mute
Toggle mute mode
KK=158
AC-3
Sets the digital audio outputs to AC-3
KK=159
PCM
Sets the digital audio outputs to PCM fixed
KK=160
PCM Variable
Sets the digital audio outputs to PCM Variable
HA=
HDMI Audio Mute
0=Audio mute disabled
1=Audio mute enabled
Status Request
ST
Request T Mode status
Returns T Channel/Source status string
SV
Request V mode status
Returns V Audio status string
SS
Request S Mode status
Returns S Front Panel status string
SQ
Request Q Mode status
Returns Q Mode status string
Network Setup
IP=
Sets IP Address
IP=xxx.xxx.xxx.xxx Defines IP address, then sends status
>IP returns the current MAC address, current IP address, subnet mask, and gateway.
Response example : $MAC=0014C81A001B
IP=192.168.001.241S IG=192.168.001.001 IM=255.255.255.000 IY=1.
S or D at end of IP signifies DHCP or Static address. 000.000.000.000 indicates DHCP,
but no DHCP server detected.
IM=
Subnet Mask
>IM=xxx.xxx.xxx.xxx. Defines subnet mask
IG=
Default Gateway
>IG=xxx.xxx.xxx.xxx. Defines default gateway
IX=
Telnet Port
>IX=xxxxx Defines Telnet port
UO
UDP Reply
Enables response strings to UDP port 31932
UF
UDP Reply
Disables response strings to UDP port 31932 (default)

Page | 14 232-ATSC 4K HDTV Tuner Product Manual 072020
Code
Function
Operation
Serial Communication
EN
Echo On
Echo On
This command is not available for Telnet. Enable local echo in the terminal program.
EF
Echo Off
Echo Off
R5
Baud Rate
0=1200
4=19.2K
1=2400
5=38.4K
2=4800
6=115.2K
3=9600 (Default)
7=230.4K
Miscellaneous Commands
HE
Help
Returns a list of serial commands
NW=
Set Name
Sets the 232-ATSC 4K name. Limited to 20 characters
NM
Get Name
Returns the 232-ATSC 4K name
ID
ID
Returns the product model and application firmware version
Z!
Reload factory default settings
Reconfigures unit for all factory default settings.
IP address will not revert to default until after a Z] command or power cycle.
Z]
Reboot
Emulates a reboot from a hard power cycle
HD2-RC IR Remote Emulation
KK=
Emulate HD2-IR Button Presses
9=Power Toggle
105=Menu
10=0
106=Right
11=1
107=Left
12=2
108=Up
13=3
109=Down
14=4
110=Enter/Select
15=5
111=Exit
16=6
115=CC
17=7
141=Output Resolution 1080i
18=8
142=Output Resolution 720p
19=9
143=Output Resolution 480p
21=Enter/Select
144=Output Resolution 480i
22= Channel Up
145=Output Resolution 1080p
23=Channel Down
146=Output Resolution 2160p/60
24=Volume Up
147=Output Resolution Auto
25=Volume Down
148=Output Resolution 2160p/30
26=Mute Toggle
149=Output RGB
27=Power On
151=Output YPbPr
28=Power Off
153=Air
29=Menu
154=Cable
63=Guide
155=16:9 Ratio Pillar Box
81=Signal
4:3 Ratio Letterbox
82=Ratio
156=16:9 Ratio Full Wide
85=Audio
4:3 Ratio Full
88=Favorite
157=16:9 Ratio V Zoom
95=List
4:3 Ratio H Zoom
96=Add/Delete Channel
158=AC=3
98=Air/Cable Toggle
159=PCM
99=Dash
160=PCM Variable
100=Info
161=Display 16:9
101=Previous Channel
162=Display 4:3

Page | 15 232-ATSC 4K HDTV Tuner Product Manual 072020
Response Strings
Typical: [Attention] [Unit#] [data ...data] [cr] [lf]
232-ATSC 4K status response strings contain ASCII characters similar to those used for the same functions in command strings. An ASCII
‘carriage return’ and ‘line feed’ follow each response string. Functions shown as N/A are not applicable or available in the 232-ATSC 4K.
Characters will appear in status strings as lowercase ‘x’.
Channel/Source Status Response String (T):
Start
Unit
CMD
Power
Major
Channel
Video
Mute
Input
RF
Received
Resolution
Minor
Channel
NA
Function
1-9
U=On
M=Off
3 digits
Unmuted
0=RF
A=Air
C=Cable
0=1080i
1=720p
2=480p
3=480i
4=1080p
N=No Sig
3 digits
0=None
<
1
T
U
032
U
0
x
0
002
x
0
The 232-ATSC 4K channel status is split into Major Channel and Minor Channel sections. The Minor Channel will always be 000 for analog
channels. The Minor Channel status will display “F00” if the Major channel is a special “one-part” digital channel. Also, as one-part channels
can go higher than 999, the Minor status will indicate how many thousands (up to 63) should be added to the Major number. Example:
Channel 1032 would return 032 for the Major Channel and F01 for the Minor Channel. Two-part channels are limited to 999-999.
Audio Status Response String (V):
Start
Unit
CMD
Power
Volume 1
Volume Mute
Stereo
Volume 2
1-9
U=On
M=Off
0-63
Emulated level
2 digits
U=Unmuted
M=Mute
N/A
0-100
Actual level
3 digits
<
1
V
U
63
U
x
100
Volume 1 emulates legacy 232-series volume level for compatibility with existing applications.
Volume 2 shows actual 232-ATSC 4K level, from 0-100. Audio status will be sent automatically following a volume toggle command from
front panel control, IR remote, or RS-232- command.
Front Panel Mode Status Response String (S):
Start
Unit
CMD
Audio
Tune
Mode
Lockout
Bass
Treble
Output
Output
Resolution
Output
Setting
NA
1-9
N/A
0=Cable
1=Air
2=IRC
3=HRC
4=Auto
0-9
Fixed
2 digits
Fixed
0=RGB
2=YPbPr
0=1080i
1=720p
2=480p
3=480i
4=1080p
5=2160p/60
7=2160p/30
0=1080i
1=720p
2=480p
3=480i
4=1080p
5=2160p/60
6=Auto
7=2160p/30
4 digits
<
1
S
x
x
0
08
4
2
0
0
xxxx

Page | 16 232-ATSC 4K HDTV Tuner Product Manual 072020
Q Mode Response String (Q):
Start
Unit
CMD
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
NA
Fixed
CC
0=Off
1=On
CC
Type
1-8
Video
Detect
(fixed)
AV
Detect
(fixed)
Label
(fixed)
IR
0=Off
9=Normal
1
digit
Digital
CC
0=Off
1=On
Digital
CC
Services
1-6
2
digits
<
1
Q
1
1
3
0
2
9
0
1
1
xx

Page | 17 232-ATSC 4K HDTV Tuner Product Manual 072020
RS-232 Cable Connections
Single Tuner
Multiple Tuners
Up to nine tuners may be daisy-chained from one RS-232 control port. Unit # addresses are required in command strings when
more than one tuner is controlled from the same control port.
Set the first unit in the RS-232 chain to the highest Unit#, then wire in sequence to the last tuner in the chain. Contemporary Research
tuners use an intelligent data bus in which the tuner with the highest Unit # receives all commands then passes through commands to
tuners with lower unit numbers. The next tuner in the chain does the same, and so on.

Page | 18 232-ATSC 4K HDTV Tuner Product Manual 072020
On-Screen Menus
Main Menu
Main on-screen menu accessible front panel Menu button or menu command.
Select Sub Menus
-Down or Up highlights option
-Select chooses Option
-Menu steps back or exits menu
-Exit closes on-screen menu
Channel Menus
Sub menu for Channels offers options for:
-Channel Auto Scan
-Favorite Channels
-Channel Add/Delete
-Fine Tune Channel (Analog Channels Only)
-Signal Strength (Digital Channels Only)
Auto Scan
-Press Up/Down to highlight scan mode
-Press Select to initiate channel scan
Analog channels will be scanned first, then digital channels. The channel list will be populated
as channels are found. Press Select during scan to skip analog channels.
Favorite Channels
Menu page for creating a list of favorite channels. Channels will be advanced by FAV button or
favorite channel commend
-Press Up/Down to highlight channel
-Press Select to Add//Delete from list
Channel Add/Delete
Channels may be added or deleted from the list of memorized channels. Channel Up/Down
will step through the physical RF channels displaying the virtual channel numbers of received
channels. Select will add or delete the selected channel. Note that in the case of multiple sub
channels on a physical channel, only the displayed sub channel will be added or deleted.

Page | 19 232-ATSC 4K HDTV Tuner Product Manual 072020
Caption Menus
This menu accesses captioning features:
-On/Off —turns captions on/off
Note: Other options are not available if captions are off.
-Analog Mode —CC 1-4 and Text 1-4
-Digital Mode —Service 1-6
-Digital Font Options
•Size —Standard (15 pixels), Large (21 pixels), or Small (11 pixels)
•Style —1-6
•Color —8 shades of background, foreground, and edge colors
•Opacity —foreground and background
•Edge —6 style options
Version Info
Displays the hardware type of the decoder/demodulator board and HD firmware version.
Also displays the AC-3 firmware version.
V-Chip Menus
This menu manages access to programming based on US and Canadian ratings standards. A
PIN number is required to access any of the sub menus. The default PIN number for access is
0000 (four zeros).
-Changing PIN accesses menu to create new PIN
-Open V-chip Setting clears all rating settings
US Rating Setting
Use navigation and Select buttons to select/deselect options. The padlock symbol indicates
channels with the selected rating will be blocked and the PIN will be required for viewing.
Signal Strength
This page also displays from the Signal remote command. The graphic shows the current
signal strength and changes in real time. The strength of a channel may be monitored as the
antenna is adjusted for best reception.

Page | 20 232-ATSC 4K HDTV Tuner Product Manual 072020
Canada Rating Setting
Sub menu equivalent to US Rating setting for Canadian applications.
Setup Menus
This series of menus select the options for tuner operation:
-Screen Format —16:9 or 4:3
-Time
-Sound Settings
-Video Noise Reduction —Available only for analog channels
-Menu Language
Screen Format
Select the appropriate aspect ratio for the connected display.
Time
Sub menus for time settings.
Time data is extracted from the System Time Table in the digital channel’s transport stream.
When Daylight Saving is enabled, the tuner will adjust the time as needed if the daylight
saving flag is enabled in the System Time Table.
Time Zone
Move cursor left and right to select the time zone. Select stores the highlighted zone.
Sound
Select from a variety of options:
-Analog MTS —Mono, Stereo, SAP
-Multi-Track Sound —English, French, Spanish
-Digital Out —AC-3, PCM, or variable-level PCM.
-Auto Volume —On or Off