The iPM-1 is a WEB Based Microprocessor-controlled unit. It provides monitoring of Forward and Reverse RF
Power of an RF Transmitter, VSWR, PTT Line State and the COR output of a radio receiver. An output is also
provided to activate the Transmitter's PTT Line manually via the web page or automatically every hour.
Other features include:
•Programming using a standard web browser directly or over LAN/WAN
• User programmable alarm set points
◦ High RF Power
◦ Low RF Power
◦ High VSWR
•1 Relay Output (trips on any alarm)
•Password Secured
•Power and Alarm LEDs
•System Log
System requirements
1) EMR Model # 2491/T2 Power Sensor for the frequency band desired.
2) EMR Model # CO8801A-PP-240 Power Sensor Cable.
3) Connection to a LAN/WAN or a Crossover Cable.
4) A standard Web Browser.
5) 12 to 15 Vdc power Supply.
Getting started
Many of the iPM-1's features are dependent upon the user’s particular situation. This documentation starts by
covering features that are common to most users.
It is assumed the installer has basic knowledge of IP and RF systems and the unit is to be installed to a VHF
Repeater at a Radio Site with Internet access via an on site LAN. Also, the Accessory Connector has been pre-wired
(see Pg. 24, “Installation” section).
IMPORTANT! IF THE PTT LINE IS CONNECTED TO THE TRANSMITTER, TEMPORARILY DISCONNECT IT FROM THE
ACCESSORY CONNECTOR TO PREVENT INADVERTENTLY KEYING THE TRANSMITTER UNTIL THE UNIT IS PROGRAMMED
CORRECTLY.
Before programming the iPM-1 you will need the following information from your network system administrator:
1) Static IP Address and Sub Net Mask.
2) Gateway Address.
3) DNS Server IP Addresses (2 each).
4) Outgoing mail server (SMTP) not requiring SSL and Port number.
5) From Email address, User Name & Password.
6) Up to 5 Email Address to receive alarm notifications..
1
Programming the iPM-1 Power Monitor
Apply power to the unit.
The iPM-1 is entirely setup and controlled from a web browser. The preferred method is to connect directly between
the IPM-1 and a computer using a crossover cable on the bench before installing the unit in the field.
The iPM-1's default IP Address is set at 192.168.3.250. This will require that the computer used for access has it's
IP address set to the same subnet (192.168.3.10, for example).
Once connected via the Crossover Ethernet cable, load the web browser and navigate to http://192.168.3.2 50 to
access the web page.
You will be prompted for a user name and password (see Fig. 1).
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Fig. 1
Enter admin for both the user name and the password. Then click “OK”.
To the left you will see the links to the following pages. With a brief description as follows:
Home
This is the main page used to view the RF Power Forward/Reverse readings, VSWR Reading, Power & VSWR
Alarm, COR and PTT States. Also Charts of Forward/Reverse Power and VSWR of the last 24 Readings (with Time
and Date) of the Power Sensor.
Power Sensor & Test PTT Setup
This page is for entering setup information for alarm set points, frequency, type of transmitter, enabling/disabling
alarm, PTT Test, PTT and COR Sense.
IP Setup
This page is for entering setup information for the IP address, Subnet Mask, Gateway, DHCP & DNS. Also Email
information, setting the Real Time Clock and changing the admin password.
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View Log
This page will display the system Log of events.
We will assume you wish to have the following setup:
IP Address: 192.168.100.200 From Email Address: myemail@xyz.com
Sub Net: 255.255.255.0Email Server: smarthost.xyz.com
Gateway Address: 192.168.100.1 Email Port: 25
DNS Server #1: 208.200.23.10 User Name: myemail@xyz.com
DNS Server #1: 208.200.23.20 Password: q1234T
Email to: tech@xyz.com
To continue with the setup process click on IP Setup.
Ensure that DHCP Server is disabled.
Now enter the IP Address, Subnet & Default Gateway information into the Static IP Address Setup table (Fig. 3).
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Fig. 3
Now click the Submit button to enter.
You will notice that the page did not reload into the browser (see Fig. 4).
Since the new IP Address you entered is in a different group you must now change the IP address of your computer,
In this example change it to 192.168.100.10.
Now enter the new IP Address into the browser, you will be prompted for the user name and password again (see
Fig 5). You will now be back at the home page. Click on the IP Setup link to return to the setup page and enter the
DNS information (see Fig. 6) and click Submit.
Fig. 6
Now enter in the Email Information (see Fig. 7) and click Submit.
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Fig. 7
Assuming that you have access to the 192.168.100.xxx LAN, you may now connect the iPM-1 and your computer to
the LAN for testing the email. Do not forget to set up the computer for the LAN (If not, skip to setting the Real Time
Clock on the following page).
If you do not have access (i.e. the LAN is at a different location) the following will have to be performed at the
installation site.
Test the email settings by selecting “1” from the selection field next to the “Test Email” submit button (see Fig. 8).
Fig. 8
If the test was successful, a message is displayed (see Fig. 9).
Fig. 9
If the email failed, a message is also displayed (see Fig. 10).
Fig. 10
Enter the GMT Time and Date. In the example below (Fig 11), the time is 17:00:09 and the Date is 08/02/2012. At
this time do not enable NIST Sync (this is best done once you have the unit in service). Next, select – or + and the
hours different from GMT and whether or not Daylight Savings Time is observed. Then click the Submit button.
Fig. 11
Note: This is a static web page. The time displayed is when the page was loaded.
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Enter a new password in the text box field (see Fig 12). It must be between 5 and 10 characters. Then click the
Submit button.
Fig 12
Note: The User Name is always “admin” in lower case, and the password is case sensitive.
Now click on the Power Sensor & Test PTT Setup to view the page.
You will be prompted for a user name and password (see Fig. 1). Enter admin for the user name and the new
password. Then click “OK”.
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The Power Sensor & Test PTT Setup page can now be viewed.
It is assumed that this unit is to be installed to a VHF Repeater and that the installing technician has identified and
pre-wired the accessory cable for PTT, PTT Sense & COR Sense (see Fig. 17 and Fig. 37). Auto Test (key the
transmitter every hour to test) is also desired.
In this example, the PTT line requires a TTL Low for Transmitting and the COR goes high when active.
First, we will configure the PTT Test Setup table.
Since the PTT line requires a low to transmit, click on Hi in the Program Output Table “Default State”. Also, enable
the feature. Since auto test is desired, click “Y” under Auto test. Set the Time Out Timer to 5 Seconds (see Fig 13).
Now we need to configure the PTT Sense Setup, since the PTT Line goes low to transmit click on Hi in the PTT
Active State table. Also Enable the feature by clicking “Enabled” (see Fig 14). Debounce should be enabled if you
experience false readings (usually not required).
Fig 14
Next, we will configure the COR Sense Setup.
In our example, the COR line will go High when a carrier is received, so click on “Hi” in the COR Active State table.
Also Enable the feature by clicking “Enabled” (see Fig 15). Debounce should be selected if you experience false
readings (usually not required).
Fig 15
Click the “Submit” button to save these settings.
Finally, we will configure the Power Sensor. Enter the Frequency in the text box.
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Leave the Alarm “Disabled” (we will test this later). Set the High Power alarm set point to “105” and the Low Power
alarm set point to “75”. Hysteresis should be “5” for both High and Low. Next set the VSWR to 2.00. Make sure
Continuous Transmitter and Log RF Reading are both “N”. Since we will be sending email to just one address check
the box labeled “1” in the Email Table (see Fig 16).
Fig 16
Note: The Frequency text Box is used for user identification only. It can also be a name (i.e. Ch. 1).
Bench Testing
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The following description is based on the iPM-1 being tested on the bench before actual installation to the Repeater
(see Fig 17 for recommended test setup). In our example we are using a 50 Watt Mobile Unit.
Connect the Power Sensor to the iPM-1 using the cable (EMR Model #CO8801A-PP-240) to the RJ-11-6
Connector marked Directional Coupler (see Fig 18).
Fig. 18
The LCD display should now read “0 FWD 0 REV”.
Using the computer log back on to the web page and view the home page.
Key up the transmitter and the RF power should be displayed on the LCD Display and the home page. Also, VSWR
should change from No Signal to a reading of the VSWR . Un-key the transmitter.
Note: There is latency on the home web page. Readings are delayed.
Next test the COR Sense by applying a high (5 Vdc) to the COR Sense line. The Reading should change from “Off”
to “On”.
Now tie the PTT Test line and the PTT Sense line together and click on the PTT Test Submit Button on the web
Page. PTT Sense should change from “Off” to “On”.
The final test will be an alarm test. Since in our example we are using a 50 Watt VHF transmitter we should get a
Low Power Alarm since the Low Alarm Set point is set at 75 Watts.
Click on the Power Sensor & Test PTT Setup link on the left of the web page to view the page.
Enable the alarm by clicking on “Y” radio button in the alarm section of the Power Sensor table (see Fig 19) and
clicking on the Submit Button.
Fig. 19
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Return to the Home page by clicking on the Home link on the left of the page.
Key the transmitter until the red Alarm LED is on then un key the transmitter.
The LCD display will read “ALARM” momentarily the then display “Low PWR 50 FWD”
The web page should also display an alarm (see Fig. 20).
Fig. 20
Now clear the alarm by clicking the “Clear Alarm” submit button on the web page.
To check the Alarm Relay operation, connect an Ohm Meter or a Continuity test unit on pins 5 and 7 of the
accessory connector. Trip the alarm again by keying and unkeying the transmitter as described above. When in the
alarm state you should read close to zero ohms or continuity.
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Now clear the alarm using the Alarm Reset located on the front panel. It will take two presses to clear the alarm.
Web Interface Access
The iPM-1 is entirely setup and controlled from the web. Once hooked up the network via Ethernet cable navigate to
the default IP address to access the interface. The default IP for accessing the web interface is:
http://192.168.3.250.
Logging In
Load the web browser & navigate to the web page by entering the IP address of the unit in the URL to access the
web page. The user will be prompted for a user name and a password. The User Name is always “admin” and the
default password is “admin”.
Viewing Current Readings and Alarms
The home page (see Fig. 21) provides an almost real time display of the current readings of Forward/Reverse
Power, VSWR and Power/VSWR Alarm status. Also, line charts of the last 24 readings are displayed for Forward/
Reverse Power & VSWR.
Note: Charts are static and can be reloaded by clicking the “Refresh Chart” button.
If the accessory output for Push To Talk (PTT) is connected and programmed correctly the user may click the “PTT
Test” button to key up the transmitter for a user programmable time to test the transmitter remotely. Also PTT Sense
and COR (Carrier on Receive) status is viewed here.
By clicking on the Power Sensor & Tests PTT Link on the left frame of the web page the Power Sensor & Tests PTT
page is displayed (see Fig. 22).
Fig. 22
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On the Power Sensor Table the User can Enter/Program the following;
Frequency:
Enter up to 8 characters of the the frequency.
Note: The Frequency text Box is used for user identification only, it can also be a name (i.e. Ch. 1).
Display:
Check the LCD check box to display the Power Sensor readings to the LCD Display Menu.
Check the HOME check box to display he Power Sensor readings on the Home page.
Alarm:
Click the “Y” radio button to activate the alarm, or the “N” radio button to disable the alarm.
Audible Alarm:
Check this check box for an audible alarm to sound from the iPM-1.
Note: This check box is only displayed after Alarm check box = “Y” and has been submitted.
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Continuous Transmitter:
Click the “Y” radio button if the unit is monitoring a Continuous Transmitter. This will allow an alarm on “0”
RF Forward Power.
Log RF Readings:
Click the “Y” radio button if logging of any change of RF Power is desired.
Click the “N” radio button to disable logging RF power with the exception of Auto PTT Test Readings.
High RF Power Alarm Set Point:
This value sets the High RF forward power alarm set point.
Hysteresis:
This value sets the sensitivity of a High RF Alarm. “0” being the lowest and “255” the highest.
Increase this number in small increments if High RF false alarms are experienced.
Low RF Power Alarm Set Point:
This value sets the Low RF forward power alarm set point.
Hysteresis:
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This value sets the sensitivity of a Low RF Alarm. “0” being the lowest and “255” the highest. Increase this
number in small increments if Low RF false alarms are experienced.
High VSWR Alarm Set Point:
This Value sets the High VSWR Alarm set point. Values should be entered to the second decimal.
For example “1.95”.
Email:
Select which of the Email Addresses entered on the IP page will be sent an email on an alarm by checking
any or all of the check boxes. Check box 1 corresponds with email address #1 up to email address #5. If
none are checked, no email notifications will be sent.
By clicking on the Power Sensor & Tests PTT Link on the left frame of the web page the Power Sensor & Tests PTT
page is displayed (see fig. 22). PTT Test can be set up on the PTT Test Setup table (see Fig 23).
The User can Enter/Program the following;
Enable/Disable:
Click the “Y” radio button to enable the PTT Test Option.
Note: Only enable if the PTT Test Line is installed to the Transmitter.
Click the “N” radio button to disable the PTT Test Option.
Program Output:
Click the “Hi” radio button for a TTL level High (5 Vdc) to be applied to the accessory PTT Test line ( #11) in
the Default State (PTT=off).
Click the “Low” radio button for a TTL level Low (0 Vdc) to be applied to the accessory PTT Test line ( #11)
15
in the Default State (PTT=off).
Time Out Timer Auto Test:
Time Out Timer
This value sets how long the PTT Test Line will become “active” in seconds after the “PTT Test”
Submit Button has been clicked or an auto test is active. The default is 5 seconds, values are 0 to
60 seconds.
Auto Test:
If the accessory output for Push To Talk (PTT) is connected and programmed correctly the user may
use the Auto Test feature. With this enabled the PTT Line is switched to the “active” state every hour
allowing the RF Power to be sampled and VSWR calculated. If any of the Alarm Set points are
reached the unit will enter the alarm mode and a Time Date stamped entry of the alarm type is
entered to the Log.
Also, when this feature is enabled, check boxes are displayed in the email address that will
allow report every 24 hours to be sent.
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Click the “Y” radio button to enable the Auto Test feature.
Click the “N” radio button to disable the Auto Test feature.
PTT Sense Setup
Fig. 24
By clicking on the Power Sensor & Tests PTT Link on the left frame of the web page the Power Sensor & Tests PTT
page is displayed (see Fig. 22). PTT Sense can be set up on the PTT Sense Setup table (see Fig 24).
The User can Enter/Program the following;
Enable/Disable:
Click the “Y” radio button to enable the PTT Test Option.
Note: Only enable if the PTT Sense Line is installed.
Click the “N” radio button to disable the PTT Test Option.
Click the “Hi” radio button if a TTL level High (5 Vdc) signals the PTT is active.
Click the “Low” radio button if a TTL level Low (0 Vdc) signals the PTT is active.
Debounce:
Debounce should be selected if you experience false readings (usually not required).
Click the “Y” radio button to enable Debounce.
Click the “N” radio button to disable Debounce.
COR Sense Setup
By clicking on the Power Sensor & Tests PTT Link on the left frame of the web page the Power Sensor & Tests PTT
page is displayed (see Fig. 22). COR Sense can be set up on the COR Sense Setup table (see Fig 25).
The User can Enter/Program the following;
Enable/Disable:
Click the “Y” radio button to enable the COR Test Option.
Note: Only enable if the COR Sense Line is installed.
Click the “N” radio button to disable the COR Test Option.
COR Active State:
Click the “Hi” radio button if a TTL level High (5 Vdc) signals the COR is active.
Click the “Low” radio button if a TTL level Low (0 Vdc) signals the COR is active
Fig. 25
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Debounce:
Debounce should be selected if you experience false readings (usually not required).
Click the “Y” radio button to enable Debounce.
Click the “N” radio button to disable Debounce.
IMPORTANT! Make sure to click on the “Submit” button on the bottom of the page to save any changes.
IP Setup
By clicking on the IP Setup Link on the left frame of the web page the IP Setup page is displayed (see Fig. 26).
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The User can Enter/Program the following:
Unit Name:
The unit name is for convenience of the user. It is used to identify the unit and can be any text up to 50
characters in length. Clicking the “Submit“ button below this table will save any changes made.
In this table the user can view the current IP configuration (see Fig. 27).
Fig. 27
DHCP Server Setup:
In most cases, a Static IP is recommended since access via the web page is achieved by the IP address. If
Dynamic Host Configuration Protocol (DHCP) is Enabled the IP address could change and make accessing
the iPM-1 difficult.
Click the “Enable” radio button to enable DHCP
Click the “Disable” radio button to disable DHCP
Click the Submit button below the table to save changes.
Fig. 28
Static IP Address Setup:
When DHCP is disabled, Static IP settings can be configured in place of the default settings (see Fig 29).
Click the Submit below the table to save any changes.
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DNS Server Setup:
DNS Settings are disabled by default.
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Fig. 29
Fig. 30
Static DNS Server Setup:
To setup Static DNS Server, first disable automatic DNS Server option, submit changes, then insert desired
Static DNS settings and submit changes again.
Fig. 31
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Email Setup
From Email Address;
Enter the from email address. This will be the address displayed as the email sender for all emails from the
iPM-1.
Email Server:
Enter the email server information here.
Email Server Port:
Enter the email port number here.
Email User Name:
Enter the email user name for the above email server here.
Enter the password for the above email user name here.
To Email Address:
Enter up to five email address to receive alarm alerts.
Note: If Auto Test is enabled additional check boxes (see Fig. 32) are displayed next to each email
address. Checking the check box will will include the email address in a daily email of the last Power
Sensor Readings. A text box is also provided to program at what hour (in GMT) to send the report.
Fig. 32
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Fig. 33
Click the Submit below the table to save any changes.
Test Email:
A Test Email can be sent to any of the five “To Email Address”. From the drop down box (see Fig. 34) select
by the number which email is to be tested then click the “Test Email” submit button. A message will be
displayed below stating if the email was successful (see Fig. 9) or it failed (see Fig. 10). Also an entry is
made in the log file.
Fig. 34
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Date & Time Setup
The iPM-1 has a built in Real Time Clock (RTC). Time can be set manually or (if the unit has access to
the internet) set and synced from a NIST Time server. At the writing of this manual the Time Server
Address's are valid. If for some reason these address's change additional servers may be found by an
internet search.
Note: Most Time Servers will disregard a request to “Sync” if to many request from the same ip
address are received in a short time period. For this reason the iPM-1 will sync once a week.
The RTC is backed up by an on board battery in the event of a power failure.
Time is 24 hour format displayed in Greenwich Mean Time (GMT) and Local on the web pages. Also, the
user can select GMT or Local time to be displayed on the LCD Display menu. All time and date stamps to
the Log and Charts are in GMT.
If the time is to be set manually “Sync with NIST” should be unchecked and Submitted. This will allow both
the GMT Time and Date text boxes to be edited.
Enter the current GMT time in the following format “hh:mm:ss” (Example: 01:01:00).
Local Time:
Local Time is calculated by the unit based on time zone/dst information entered by the user.
GMT Date:
Enter the current GMT Date in the following format “mm/dd/yyyy” (Example: 01/01/2012).
Local Date:
Local Date is calculated by the unit based on time zone/dst information entered by the user.
Display:
Check the LCD check box to display the Time/Date to the LCD Display Menu.Check the GMT radio button
to display the GMT Time/Date to the LCD Display Menu. Check the LCL radio button to display the
Local Time/Date to the LCD Display Menu.
Sync with NIST:
Checking the “Enable” Check box will enable Automatic Syncing and disable manually setting the RTC.
The port for the NIST server is also entered in the “Port” text box.
Primary Server / Secondary Server
If NIST sync is used, enter a primary and secondary server in the text boxes, replacing the default
addresses are (see Fig. 35).
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Time Zone
Click either the “+” or “-” Radio Button and Select the Hour difference from GMT of the installation location.
Example: Phoenix, Arizona is 7 hours less that GMT (-7).
Daylight Savings Time
Check the observed check box if daylight savings time (DST) is observed.
Example: Phoenix, Arizona does not observe DST so the box is left unchecked.
Click the Submit below the table to save any changes.
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Installation
General
Connections to the transmitter, receiver and DC power are grouped on a detachable accessory connector
on the rear of the iPM-1 for ease of installation.
Connection for the Power Sensor should be made at the Output of the transmitter.
Equipment Required
Fig. 35
1. Assorted small tool kit associated with electronics.
2. A VOM Meter.
3. A Computer with an Ethernet port and Web Browser.
Since each installation is different, we do not supply a cable for the electrical hookup. Any combination of 24
AWG stranded wire will do. A typical shielded multicable used for connecting Radio Local controls such as
Beldon 9538 works well. In some cases (RF Sites with extremely high RF levels) may require Shielding on
each individual wire.
The installation below is based on using a section of Beldon 9538 multicable.
Also, installing a 2 Amp Fuse assembly is recommended on the A+ Lead.
Input and Output Requirements
Most modern repeater/base stations have accessory connectors to simplify installing optional
equipment such as Local Controls. Many have programmable Input/outputs that use TTL levels (0 Vdc=Low
5 Vdc= High). With this in mind the Ipm-1 was designed to interface with TTL. The installation
procedure below is based on a repeater having TTL inputs and outputs.
Please call the factory for assistance if your application is not TTL.
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INSTALLATION PROCEDURE
Power Supply
1. Remove the 12 Pin Accessory Jack from the rear of the unit.
2. Locate the 12 Vdc supply of the Repeater. Using the VOM measure the voltage to ensure it is
between 12 to 15 Vdc and ascertain it can supply at least 1 amp.
3. Remove power from the Power Supply
4. Connect the black wire to the Power Supply Ground lead and Pin 12 of the Accessory connector.
5. Connect the red wire to the Positive Supply lead and Pin 10 of the Accessory connector.
Transmitter PTT
1. Locate the PTT point of the transmitter.
2. Determine what signal is required. And make a note of it. (In our example a Low (0 Vdc) keys the
Transmitter and the line goes high (5 Vdc) when un-keyed.)
3. Connect the Green to the PTT Point and Pin 11 of the Accessory connector.
PTT SENSE
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Note: In our example of PTT above, the PTT line is using TTL levels, so in this case simply Jump Pin 11
(PTT) to Pin 8 (PTT Sense).
COR Detect
1. Locate the Carrier on Receive Point of the receiver (this can also be PL/DPL detect, Audio mute etc.)
any signal that detects that the radio is receiving a signal. Carrier Detect is best since this signal
would indicate that Some signal is being received and could help in diagnosing a problem.
2. Determine what the signal change is and make a note of it (in our example the signal is Low (0 Vdc)
with no signal and goes High (5 Vdc) when a signal is received 0.
3. Connect the Yellow wire to this point and Pin 9 of the Accessory connector.
Power Sensor
1. Making sure the Transmitter IS NOT Keyed install the Power Sensor to a convenient location after
the Transmitter Output. Making sure the the arrow label points to the antenna.
2. Connect the Power Sensor Cable (EMR Model #CO8801A-PP-240) from the RJ 11 jack of the power
sensor to the RJ-11 Jack marked “Directional Coupler” on the back of the iPM-1 (see Fig. 18).
Cable Shielding
If Shielded cable is used connect the shield to any of the Ground connections(see Fig. 36).
Programming
From this point, refer to the “Getting Started” and Programming Sections.