Examples of cocoaModem QSO's
for Blind & Vision-Impaired Hams

 

   This page is a supplement to the articles about cocoaModem text-to-speech and accessibility, as well as "PSK31 Operating Notes from a Blind Ham."

   QSO #1 demonstrates calling CQ using PSK31. It requires a radio with a narrow bandwidth receive filter, eg, 100-250 Hz. By listening to the receiver audio, you can identify a quiet spot on the band.

   QSO #2 demonstrates answering a CQ call on PSK31. In this case the radio receiver filter should be wider, eg, 2400 Hz, so the cocoaModem PSK Table View can monitor a range of frequencies.

   Spoken feedback by cocoaModem is in quotes.

QSO #1—Calling CQ

Summary:  After the radio is tuned, the keyboard entries (including the macros Cmd-1, Cmd-2, and Cmd-3) are as follows:

     Cmd-1.                                                       (Send CQ.)
     Cmd-Opt-C. w1bls.                                     (Enter QSO call sign.)
     Cmd-2. Hello, my name is... Cmd-3.           (Reply.)
     etc...

Details:  These are the steps, in order:

     Open cocoaModem.
     Tune cocoaModem to 1500 Hz (the center of the radio receiver
          passband):  Cmd-Shift-F.  1500.  Enter.  "Tuned to 1500 Hz."
     Tune radio VFO knob to a quiet frequency.
     Transmit CQ macro:  Cmd-1.  "CQ CQ CQ from AE7PD AE7PD.
          Please go ahead."
     Listen for response.
     Enter QSO Call Sign: Cmd-Opt-C. W1BLS. "Call sign. W1BLS."
     Transmit opening:  Cmd-2.  "W1BLS from AE7PD AE7PD."
     Type message:  "Hello, my name is..."
     Send closing:  Cmd-3. "Back to you. W1BLS from AE7PD. Please
          go ahead."
     etc...

QSO #2—Answering a CQ Call

Summary: Here are the keyboard entries after you hear a CQ call.

     Cmd-Opt-C. w1bls                                   (Enter QSO call sign.)
     Cmd-4.                                                   (Send ID and listen.)
     Cmd-2. Hello...  Cmd-3.                           (Reply.)
     etc.

Details:

     Open cocoaModem.
     Open PSK Table View: Cmd-B.
     Scan for signal: Cmd-period...  "Tuned to 1120 Hz."
     Enter QSO Call Sign: Cmd-Opt-C. w1bls. "Call sign. W1BLS."
     Answer the CQ:  Cmd-4.  "W1BLS from AE7PD AE7PD. Please
          go ahead."
     Listen to reply.
     Transmit opening: Cmd-2.  "W1BSL from AE7PD AE7PD."
     Type message: "Hello, my name is..."
     Send closing: Cmd-3. "Back to you. W1BLS from AE7PD. Please
          go ahead."
     etc...

Notes:

   One way to open cocoaModem using keyboard shortcuts is to use the Mac OS X Spotlight search box. Press Cmd-Spacebar, type "cocoaModem" and press Enter. Cmd-Q closes the program.

   To streamline program start-up, select "Automatically turn on a modem..." in Preferences > Connection Tab. The shortcut to the Preferences panel is Cmd-Comma.

   With PSK, sending lower case characters is faster and more efficient, because they are coded using fewer bits than upper case.

Acknowledgments

   Thanks to Brian, W1BLS, and Chen, W7AY, for all their help.

Author Information

   Peter DeNeef, AE7PD, is an Extra Class amateur radio operator in the U.S. This Web site has no ads or conflicts of interest.
Email:  HamRadioAndVision "at" gmail "dot" com.

rev. 2/2/2013

HamRadioAndVision Table of Contents