Apogee 2349 DLTM4 User manual

AL6300 DATA LINK TEST SET PRODUCT
LINE
MODEL 2349 DLTM4
APOGEE LABS,INC.
i
09.21.2017
210 South 3rd Street, North Wales, PA 19454
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INSTRUCTIONS
For
MODEL 2349
DLTM4
DATA LINK TEST MODULE

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AL6300 DATA LINK TEST SET PRODUCT LINE
MODEL 2349 DLTM4
APOGEE LABS,INC.
iii
09.21.2017
210 South 3rd Street, North Wales, PA 19454
Tel: [phone] Fax: [phone]
TABLE OF CONTENTS
1. FEATURES .................................................................................................................................. 1
2. PURPOSE OF MODULE............................................................................................................. 1
3. FUNCTIONAL DESCRIPTION.................................................................................................. 1
4. SPECIFICATION......................................................................................................................... 2
5. INSTALLATION ......................................................................................................................... 3
5.1 GENERAL............................................................................................................................ 3
5.2 MODULE PLACEMENT CONSIDERATIONS................................................................. 3
5.2.1 SYNC STATUS INDICATION (AL6300-LCD CHASSIS SYNC DISPLAY).......... 3
5.3 CONNECTION & PHYSICAL CONFIGURATION.......................................................... 3
5.4 OPERATION........................................................................................................................ 6
5.4.1 Measurements MENU .................................................................................................. 7
5.4.2 Output SETTINGS........................................................................................................ 8
5.4.3 Input SETTINGS........................................................................................................ 11
5.4.5 PRN SETTINGS......................................................................................................... 12
5.4.6 PCM SETTINGS........................................................................................................ 13
5.4.7 EDIT PCM.................................................................................................................. 14
5.4.8 DATA LOG SETUP................................................................................................... 15
5.4.9 PRESETS.................................................................................................................... 16
5.4.10 Data capture................................................................................................................ 17
5.5 REMOTE COMMANDS ................................................................................................... 18
5.5.1 SET ............................................................................................................................. 18
5.5.2 READ.......................................................................................................................... 18
5.5.3 HELP........................................................................................................................... 18
5.5.5 SAVE/LOAD.............................................................................................................. 18
5.6 COMMAND DEFINITIONS ............................................................................................. 18
6. APPLICATION NOTES ............................................................................................................ 21
6.1 GENERALIZED DATA LINK TESTING ........................................................................ 21
6.1.1 “I” & “Q” CHANNELS.............................................................................................. 21
6.1.2 ERROR SIMULATIONS........................................................................................... 21
6.1.3 BLANKING................................................................................................................ 22
6.1.4 SYMMETRY TESTS................................................................................................. 22
6.1.5 PULSE CODED MODULATION ............................................................................. 22
6.2 GENERATING PCM DATA STREAMS.......................................................................... 23
5.4.10 BASICS....................................................................................................................... 23
5.4.10 EXAMPLES OF TDM PCM FORMATS.................................................................. 24
6.3 MEASURING LINK DELAY ON A FULL DUPLEX LINK........................................... 25
5.4.10 SETUP & CONFIGURATION .................................................................................. 26
5.4.10 MEASURING THE LINK DELAY........................................................................... 26
6.4 DOPPLER SHIFT WITH THE DLTM4............................................................................ 26

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AL6300 DATA LINK TEST SET PRODUCT LINE
MODEL 2349 DLTM4
APOGEE LABS,INC.
v
09.21.2017
210 South 3rd Street, North Wales, PA 19454
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TABLE OF FIGURES
Figure 1: Model 2349 DLTM4 Block Diagram...................................................................................................................2
Figure 2: Model 2349 Connection Panel and Side Views ...................................................................................................4
Figure 3: TTL Data, Clock and System Time (ST) Input....................................................................................................6
Figure 4: RS-422 Data and Clock Input ..............................................................................................................................6
Figure 5: TTL Data and Clock Output.................................................................................................................................6
Figure 6: RS-422 Data and Clock Output............................................................................................................................6
Figure 7: Bipolar Output......................................................................................................................................................6
Figure 8: Status Menu..........................................................................................................................................................7
Figure 9: TX SETUP SCREEN...........................................................................................................................................8
Figure 10: CLOCK POLARITY SETTINGS....................................................................................................................10
Figure 11: DATA POLARITY SETTINGS......................................................................................................................10
Figure 12: Receiver Setup Screen......................................................................................................................................11
Figure 13: PRN Generator Setup Screen ...........................................................................................................................12
Figure 14: PCM SETUP SCREEN....................................................................................................................................13
Figure 15: PCM DATA EDIT SCREEN...........................................................................................................................14
Figure 16: Data Log Setup Display ...................................................................................................................................15
Figure 17: PRESET Control Screen ..................................................................................................................................16
Figure 18: DATA CAPTURE Screen................................................................................................................................17
Figure 19: Typical Telemetry Data Link Block Diagram..................................................................................................21
Figure 20: DLTM Transmitter Block Diagram .................................................................................................................23
Figure 21: Basic Setup for Measuring Link Delay ............................................................................................................25
TABLE OF TABLES
Table 1: Jumper Configuration............................................................................................................................................4
Table 2: I/O Connector Definitions .....................................................................................................................................5
Table 3: Selectable Definitions of the actions field on the Status Screen............................................................................7
Table 4: Selectable Definitions of the actions field on the Status Screen............................................................................8
Table 5: Selectable Definitions of the actions field on the RX Settings display................................................................11
Table 6: Selectable Definitions of the actions field on the PRN Settings display .............................................................12
Table 7: Selectable Definitions of the actions field on the PCM Settings display.............................................................13
Table 8: Selectable Definitions of the actions field on the EDIT PCM display ................................................................14
Table 9: Selectable Definitions of the actions field on the Data Log Setup Display.........................................................15
Table 10: Selectable Definitions of the actions field on the Presets display......................................................................16
Table 11: Selectable Definitions of the actions field on the Presets display......................................................................17
Table 12: Total Instruction Set ..........................................................................................................................................18

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MODEL 2349
DLTM4
DATA LINK TEST MODULE
1. FEATURES
Independent Transmit & Receive
Functions
Bit Rate from 100 bps to 50 Mbps
Adjustable in 1 bps steps
Internal Synthesizer or External
Clock
20 ppm Accuracy and Stability
Input/Output Bit Code Selection:
NRZ-L/M/S; BiP-L/M/S;
RNRZ-L; DM-M/S
Link Delay Measurement
Round Trip or simplex
Simulates Doppler Shift
User Configurable Measurements
2. PURPOSE OF MODULE
The Model 2349 DLTM4 provides the capabilities needed to perform bit-error-rate performance testing of data
links and associated hardware, such as PCM bit synchronizers and frame synchronizers. Data bit rates from
100 bps to 50 Mbps are supported. Measurement capabilities include: Bit Error related tests, bit slip tests, and
measurement of round trip data link delay.
Basic input and output interfaces included on the module may be supplemented by the addition of I/O interface
modules at the system level.
3. FUNCTIONAL DESCRIPTION
The transmitter and receiver contain independent circuits to generate test data and to receive and detect errors
using either pseudo-random number (PRN) data sequences or time division multiplexed (TDM) programmed
data values (PCM data). No operator intervention is required to initiate the data synchronization process,
regardless of link delays. Data code conversion is included for all IRIG-106 codes. Figure 1 is a functional
block diagram of the DLTM4 module.
The PRN Receiver automatically synchronizes a local data generator to the received PRN data sequence. The
error free locally generated data stream is compared bit-by-bit to the input data to detect and identify errors.
When using the PCM mode of operation, the format instructions entered into the transmit (TX) memory are
copied into the receive (RX) memory. The PCM Receiver monitors the received data stream, locates the frame
sync pattern and synchronizes a local data generator to the delayed PCM data being received. Bit by bit
comparisons are made between the received data and the local data generator to detect and identify received
errors.
The module occupies three slots in an AL4300-LCD or AL6300-LCD chassis.

Apogee Labs Inc. products are sold by description only. Apogee Labs Inc. reserves the right to make changes in circuit design, software, hardware and/or
specifications at any time without notice. Although Apogee Labs Inc. believes that the information provided is current and accurate, Apogee Labs Inc. does not
assume any responsibility or liability for the use of any product described. It is the responsibility of the user to determine appropriate use of the product in any
given application. 2
PRN
RECEIVER PCM
RECEIVER
LOCAL
GENERATOR LOCAL
GENERATOR
FRAME MARK
ERROR
SYNC
ERROR DETECT &
MEASURE
PCM DATA
RX MEMORY
DDS
PRN GENERATOR
PCM GENERATOR
BIT CLOCK
PCM DATA
TX MEMORY
CONTROL
PROCESSOR
(MPU)
BACKPLANE
"ALISDT"
CONTROL BUS
RX INPUT
INTERFACES
ERROR INSERT,
CODE CONVERT,
RANDOMIZE,
POLARITY SELECT,
OUTPUT
INTERFACES
TX
OUTPUT
Figure 1: Model 2349 DLTM4 Block Diagram
4. SPECIFICATION
TEST MODES
Accumulate (manual reset and re-start)
Time-Based Interval (1 second to 500 hours)
Bit-Based Intervals (10 to 1012 bits)
MEASUREMENTS
Received Bit Rate
Bit Count
Receiver Re-Syncs (slips)
Bit Error Count
Ones in Error
Bit Error Rate
Bit Slip Probability
Symmetry
Frames in Error
Seconds in Test
Seconds in Error
Link Round-Trip Link Delay
One-Way Link Delay
ENVIRONMENT
Operating temperature: 0° to +50° C
Relative Humidity: 0 to 95%, non-condensing
Requires 3 card slots
TX / RX COMMON FEATURES
Bit Codes
NRZ-L/M/S, BIP-L/M/S, DM-M/S, RNRZ-L
PRN Patterns: Forward and Reverse
27-1, 29-1, 211-1, 215-1, 220-1, 223-1, 231-1
TDM Format
4-32 bit Frame Synchronization
Up to 4096 words/frame
8, 16, 32 bits per word
General and Unique Data
TRANSMITTER
Bit Rate
100 bps to 50 Mbps
User selectable Doppler shift rates
Error Injection
One Error per Command
Constant Rate 10-2 to 10-6 error rates
Uniform or random distribution
Blanking
10 to 4096 bits every 64 to 1024 bits
Free running or Synchronized to frames
Force output to all zeros
Force 1 TX bit slip
RECEIVER
Auto Synchronization
PRN or TDM
Signal Polarity Selection
Clock and/or Data Normal or Inverted
INTERFACES
TTL - 50/75 ohm, BNC Connector
RS422 - 120 ohm
BiPolar Output - 100 bps to 35M bps (2V p-p)
POWER CONSUMPTION
4.8 Watts

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5. INSTALLATION
5.1 GENERAL
The DLTM4 module is the test data generator / receiver and measurement device used in the AL6300-LCD Data Link Test
Set. It also may be used in the AL4300-LCD series equipment in combination with Apogee Labs data multiplexing /
demultiplexing devices. The module is self-contained: transmitter, receiver, and measurement functions are combined
with a microprocessor that supports front panel and remote control operations. Signal input and output connections are
provided on the circuit board I/O panel. The module does not connect to the data paths on the chassis backplane. Only
DC power is drawn and front panel communication occurs with the chassis. When used in the AL6300-LCD chassis, front
panel LCD status indicators are connected to the module. These indicators are user-configurable to illuminate for
conditions that benefit the user. All operating firmware is contained on the module. Therefore, installation of a DLTM4 in
the field is accomplished simply by plugging it into an Apogee Labs LCD chassis.
5.2 MODULE PLACEMENT CONSIDERATIONS
The DLTM4 plug-in module requires three card slots and can be placed in any slot of an AL6300-LCD chassis .When
placing the DLTM4 in an AL4300-LCD chassis, it also may be placed anywhere within the chassis. When placing the
DLTM4 in a chassis that also contains multiplexing equipment, in the interest of operational efficiency, it is best to place
this module in the card slot at the far right side of the multiplexing cards facing the rear of the chassis.
Module position has an effect on front panel and remote control operations. When the PAGE/NEXT/PREV keys are
depressed, the next or previous card slot is activated for front panel operations. Remote control of a module is governed
by the slot in which the module resides. The Slot number of each installed module is determined by the slot number along
the top that is white.
5.2.1 SYNC STATUS INDICATION (AL6300-LCD CHASSIS SYNC DISPLAY)
Located on the top of the front panel LCD display of an AL6300-LCD or AL4300-LCD chassis are a row of status
indicators. These indicators are user configurable and can be set to turn green or red depending on what the user set as
fault conditions. Any status field can be monitored and a condition can be set to change the status indicator from one color
to another.
5.3 CONNECTION & PHYSICAL CONFIGURATION
The DLTM4 module outputs and inputs serial test data with an associated coherent clock. The signaling to this module
may be either TTL or RS-422. The TTL serial input connectors are BNC type with shield connected to chassis and digital
ground. RS-422 signals are to be found on the Triaxial connectors.
An external, user supplied, TTL level bit-clock may be used in place of the internally generated clock. This is called system
timing (ST). This signal is applied to a BNC connector. It is recommended that good quality coaxial cables be used for all
signal connections. Figure 2 illustrates the connector panel and side view of the module. Table 1 provides the termination
configuration for the DLTM4. Table 2 provides definitions for each connector and an associated reference line drawing of
the I/O panel detailing the location and designation of the connectors.

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JP3 JP4 JP6JP2JP7
JP5
Figure 2: Model 2349 Connection Panel and Side Views
The BNC input connections are terminated on the module. Jumpers are installed or removed to select the desired value of
shunt resistance. Table 1 defines the resulting shunt resistance for given jumper configurations. Figure 2 indicates the
location of each jumper.
Table 1: Jumper Configuration
Signal
Jumper
Shunt Resistance
Name
Connector
Jumper 2-3
OPEN
Jumper 1-2
SYSTEM TIME (ST)
J9
JP5
50
10K
75*
TTL RX DATA
J7
JP6
50
10K
75*
TTL RX CLOCK
J8
JP7
50
10K
75*
RS422 RX DATA
J3
JP4
75
Invalid
110*
RS422 RX CLOCK
J4
JP3
75
Invalid
110*
IRIG
J11
JP2
600*
600
75
*Default configuration.

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Table 2: I/O Connector Definitions
RS422 TTL
TX DATA J1
TX CLOCK J2
RX DATA J3
RX CLOCK J4
TX DATA J5
TX CLOCK J6
RX DATA J7
RX CLOCK J8
IRIG
IN J11
BIPOLAR
OUT J10
TTL ST J9
DLTM4
2349
Reference
Signal Name
Standard
Direction*
J1
TX DATA
RS-422
OUT
J2
TX CLOCK
RS-422
OUT
J3
RX DATA
RS-422
IN
J4
RX CLOCK
RS-422
IN
J5
TX DATA
TTL
OUT
J6
TX CLOCK
TTL
OUT
J7
RX DATA
TTL
IN
J8
RX CLOCK
TTL
IN
J9
System Time (ST)
TTL
IN
J10
BiP DATA
BIPOLAR
OUT
J11
TIME
IRIG-B
IN
*Direction is in reference to the DLTM4 (OUT means out
of DLTM4).
The Input and Output circuits for each of the interfaces are shown in the following figures. Both interfaces, TTL (Figure
3 and Figure 5) and RS-422 (Figure 4 and Figure 6) present inputs and outputs for data and clock. Both data and clock are
supported by the typical circuit presented. The BiPolar circuit (Figure 7) is an output and does not have a corresponding
input circuit. The System Time (ST) input is supported by a typical TTL input circuit.

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Input Circuits
GND
TTL Receiver
10K
24.9
24.9
24.9
123
Figure 3: TTL Data,
Clock and System Time (ST) Input
GND 1.5K
5V
49.8 422 Receiver
321
75
1.5K
Figure 4: RS-422 Data and Clock Input
Output Circuits
TTL Driver
5Ω
Figure 5: TTL Data and Clock Output
GND
422 Driver
Figure 6: RS-422 Data and Clock Output
+5V
-5V
Bipolar Driver 75
Figure 7: Bipolar Output
5.4 OPERATION
The DLTM4 may be controlled and monitored from the front panel of the chassis in which it is installed or by means of
the remote control features provided by that chassis. More detailed information explaining the use of the front panel
controls that are used to access and program the menus depicted in the following paragraphs is to be found in the AL6300-
LCD or AL4300-LCD Instruction Manual. A brief explanation is presented here.
To change from one module to another module within the AL6301 chassis, press the NEXT or PREV buttons on the top
right of the display. This will display the next or previous module in the chassis based on slot location. The current slot
location can be determined by which slot number above the indicator lights is shaded white. Note that the DLTM4 module
occupies 3 slots, but its front panel location is the lowest slot the module occupies. Below the status indicator will be the
module’s name, software version and page title.
The DLTM4 has multiple screens for configurations and status. The screens can be navigated between by pressing the
function (Fn) buttons on the right of the display or touching the field on the display.
To change a value of a parameter associated with a given field, use either the directional arrows to move to the field desired
or you can use the touch-screen and touch the field wanted to be edited. To modify the field use the INC/DEC buttons to
change text values. Use the numeric keypad to edit numeric values. After setting the value, press the enter button.

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5.4.1 MEASUREMENTS MENU
The initial screen that the DLTM4 comes to is the Measurements Menu. The Measurements menu is depicted in Figure 8.
The Measurements Display provides status of the currently running test. The Clear (F5) button clears out any current
measurements and allows the test to continue running. The action field is associated with the send button. The action field
allows the user to select between different actions to perform during a test. The table bellows describes the actions.
Table 3: Selectable Definitions of the actions field on the Status Screen
Selectable Function
Definition
Insert Error
Invert a single bit in the output bit stream
Insert Slip
Cause a bit slip resulting in loss of receiver lock
Start Zero
Force the output stream to all Zeros
Stop Zero
Restore normal output data stream
Force Resync
Force the receiver correlator to resynchronize
Freeze Display
Freezes the current values on the display
Update Display
Restores the measurement process
Test link delay
Initiates the data link delay process –Only valid for PRN on a “Clean Link.”
Pressing the send button on the touch-screen performs the actions in the action field.
The other fields on the right (F1-F4) bring up the screen for different menus. See the following sections for descriptions
of these screens.
F1
F2
F3
F4
F5
Figure 8: Measurements Menu

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5.4.2 OUTPUT SETTINGS
Selecting the Output Settings screen brings the display shown in Figure 9.
F1
F2
F3
F4
F5
Figure 9: TX SETUP SCREEN
Using this menu, configure the primary functions of the Transmit (output) interface. Each of the fields contained on the
display are explained below. The Output settings control the data and clock characteristics, including data content, Doppler
shifting, error insertion and blanking.
Table 4: Selectable Definitions of the actions field on the Status Screen
Field
Definition
Clock
Select Internal or External clock. This field is automatically modified to show DOPPLER if the
DOPPLER function is selected and enabled.
Bit Rate
Data rate of internal clock from 100 bps to 75,000,000 bps
The maximum rate of 75Mbps is valid, but the module is only specified to operate up to
50Mbps. At higher rates, careful attention must be payed to cabling and termination.
Type
Selects the output data source as PRN or PCM data
Code
NRZ-L, NRZ-M, NRZ-S, BiP-L, BiP-M, BiP-S, RNRZ-15, DM-M, DM-S
Polarity
+clk/+dat, -clk/+dat, +clk/-dat, -clk/-dat (Refer to Figure 10:CLOCK POLARITY
SETTINGS and Figure 11:DATA POLARITY SETTINGS)
Doppler Shift
Operation
The Doppler function is enabled (On) by selecting Single sweep, Cycle sweep or Sawtooth
sweep. The Doppler function is disabled by selecting Off.
Doppler Mode
Determines the bit rate change curve. Selecting Curve causes the output bit rate to follow a
frequency change curve that emulates the data rate changes received from an orbiting satellite.
Selecting Linear results in a bit rate change profile that is a linear ramp function.
Cycle Time
Sets the time to cycle from the START bit rate to the END bit rate; programmable from 1 to 600
seconds.
Start
Starting frequency from 100 bps to 50,000,000 bps
End
Ending frequency from 100 bps to 50,000,000 bps
Error Insertion
Error Type
No Errs, Periodic, Random
Error Rate
1.0E-2, 1.0E-3, 1.0E-4, 1.0E-5, 1.0E-6

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Blanking
Blanking
Enable or Disable
Non-Blank
Define the number of bits transmitted that remain as intended by the generator before permitting
the blanking function to force bits to zero. This value is programmable from 64 to 1024.
Blank
Defines the number of bits after NON-BLANK that are to be forced to zero. This value is
programmable from 10 to 4096.
Mode
Free Running or Per Frame as referenced to the start of each frame or PRN sequence.
Function Keys
F1
Go directly to Measurements display
F2
Go directly to PCM display
F3
Go directly to PRN display
F4
Go directly to Input Settings display
F5
Go directly to Presets display

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DIGITAL VALUE 0 1 0 1
POS CLOCK TTL
NEG CLOCK TTL
POS CLOCK RS-422
signals: A(+) red, B(-) blue
NEG CLOCK RS-422
signals: A(+) red, B(-) blue
Figure 10: CLOCK POLARITY SETTINGS
POS TTL DATA
NEG TTL DATA
DIGITAL VALUE 0 1 0 1
POS DATA RS-422
signals: A(+) red, B(-) blue
NEG DATA RS-422
signals: A(+) red, B(-) blue
POS BIPOLAR OUT 0 Volts
+1 Volt
-1 Volt
NEG BIPOLAR OUT 0 Volts
+1 Volt
-1 Volt
Figure 11: DATA POLARITY SETTINGS

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5.4.3 INPUT SETTINGS
The Input Settings display provides the ability to control the parameters associated with the data and clock being received
by the DLTM4. This screen is shown in Figure 12.
F1
F2
F3
F4
F5
Figure 12: Input Settings Display
This allows the configurations of the ability to control which interface to test and how the data is being received. The
descriptions of the options are listed below:
Table 5: Selectable Definitions of the actions field on the RX Settings display
Field
Definition
Interface
TTL, RS422, LOOPB
RX Code
This field is used to select the bit code that is applied to the receiver. The selectable codes are:
NRZ-L, NRZ-M, NRZ-S, BiP-L, BiP-M, BiP-S, DM-M, DM-S
RX Polarity
+clk/+dat, -clk/+dat, +clk/-dat, -clk/-dat (Refer to Figure 10 and Figure 11)
RX Mode
Accumulate: collect data continuously.
Timed: collect data per time period.
Bit Period: collect data per defined number of bit periods
Bit Interval
This field defines the test period in bits if the RX MODE is set to Accumulate. The number of bits
is selectable to be: 10E+1 through 10E+12
If the RX MODE is set to Timed, the test is based on elapsed time and is programmable from 1 to
1,800,000 seconds.
Function Keys
F1
Go directly to Measurements display
F2
Go directly to PCM display
F3
Go directly to PRN display
F4
Go directly to Output Settings display
F5
Go directly to Presets display

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5.4.5 PRN SETTINGS
The PRN SETUP screen is used to define the pseudo random number sequence and its generator direction. The information
on this screen is only pertinent if, on the Output SETUP screen in Figure 9, the TYPE is set to PRN.
F1
F2
F3
F4
F5
Figure 13: PRN Generator Setup Screen
The following table describes the fields from the PRN Setting display.
Table 6: Selectable Definitions of the actions field on the PRN Settings display
Field
Definition
Pattern
Select the pseudo random data sequence (PRN) length from: 2E+7, 2E+9, 2E+11, 2E+15, 2E+20,
2E+23, 2E+31
Fwd/Rev
Defines the direction of the PRN pattern generation as Forward or Reverse
Insert Time
ON/OFF. This tells the DLTM4 to insert the IRIG time into the PRN stream for link delay testing
Function Keys
F1
Go directly to Status screen
F2
Go directly to Input Settings display
F3
Go directly to Output Settings display
F4
Go directly to Presets display

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5.4.6 PCM SETTINGS
The DLTM4 is programmable to output either a PRN data sequence or a simulated time-division-multiplexed (TDM) PCM
data stream. The PCM Settings display is used to configure the fixed parameters of the TDM stream. Dynamic data
associated with the stream are configured in this menu and in the EDIT PCM menu (Figure 15).
F1
F2
F3
F4
F5
Figure 14: PCM SETUP SCREEN
The PCM Settings display provides for turn the PCM output on or off. It also allows from the general frame size and
The Frame Counter changes once per frame and is configured to operate according to the user’s settings.
Table 7: Selectable Definitions of the actions field on the PCM Settings display
Field
Definition
Run PCM
RUN/HALT This field tells the DLTM4 whether to output the PCM data or not, this must be set
to RUN for the PCM to be output.
Frame Structure
General Word
This defines the “General Word”, which is a word that can be defined for inclusion in the PCM
frame in the EDIT PCM display.
Bits per Word
This defines the number of bits per word in the PCM frame. This can be set from 4 to 16 bits.
Words/Frame
This defines the number of words in the PCM frame. This can be set from 8 to 4096 words.
Frame Counter
Direction
Increment/Decrement –This tells the frame counter if it counts up or down.
Count Min
Set to 0x0 or 0x1. This defines the lowest value for the Frame Counter.
Count Max
From 0x1 to 0xFFFF. This defines the highest value for the Frame Counter.
Function Keys
F1
Go directly to Status screen
F2
Go directly to the Edit PCM display
F3
Go directly to the Data Capture display
F4
Go directly to Output Settings display
F5
Go directly to Presets display
NOTE:
1. Programming changes cannot be made to any PCM related function while the program is running.
2. Type must be set to PCM in Output SETUP menu for a PCM program to run.

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5.4.7 EDIT PCM
The EDIT PCM menu permits the definition of the TDM output data stream. Up to 4096 data words per frame may be
generated using a combination of instructions defined in Table 8.
F1
F2
F3
F4
F5
Figure 15: PCM DATA EDIT SCREEN
Up to 32 instructions are accepted for this process. The EDIT PCM display is divided into up to three sub-screens that are
accessed by using the F2 and F3 function keys. The instruction numbers are displayed at the left of each sub-screen. On
the left column the type up data must be selected. On the right column, the data is placed that corresponds to the instruction
to the left of it. Any values placed that exceed the frame length ate ignored.
Table 8: Selectable Definitions of the actions field on the EDIT PCM display
Instruction
Definition
Load FSP
Transmit bits for the sync pattern. The FSP in location 1 is the first word and the FSP in location
2 is the second word.
Load IMM
Transmit a user programmable immediate hex value from command data field
Load FRCNT
Transmit a frame counter (setup in FRCNT)
Repeat
Repeat the preceding command N times where N is a decimal value programmed in command
data field
Function Keys
F1
Go directly to Measurements display
F2
Go directly to the instruction sub-screen listed
F3
Go directly to the instruction sub-screen listed
F4
Go directly to the PCM Settings display
F5
Go directly to the Data Capture display
Note: Programming PCM functions must be done in Halt Mode only.