Sir Lunchalot has issued his decree. There will be a luncheon at the Highlander hotel Holden Hill on the 31st of October. Hope to see as many as possible.

See you all there

Hi All,
Over the last couple of weeks we have had reports of  intermod
interference on the tail of our 70 cm repeater, most likely from a
commercial trunking system, most probably the SAGRN about 3km away.
To alleviate the problem we have replaced the duplexer, added an
isolator to the transmitter output, and invoked tone access to the
receiver using the standard tone frequency of 91.5Hz.
The delay in taking action to fix the intermod problem was due to the
time to purchase the isolator. We regret the inconvenience so far and
would like to hear reports of the transmission quality after the fix.
We would also ask that you pass on any further issues to us.
Cheers
Graham Kimber VK5GM
President NERC

Steve entertained us with a presentations of the in’s and outs of Digital Amateur Television. He went to a significant effort setting up his transmitter and showing the block stages of equipment. A lot of detail was given about the importance of filters due to being allocated only 1Mhz below the commercial frequencies. Steve is keen to get more amateurs involved even if receiving only, (this can be done with a cheap Laser set top box and manually tuning it to 445.5Mhz). A really huge thankyou to Steve for an entertaining and informative evening.

Steve has provided a list of topics that would be useful to study up on if you are interested in Amateur TV:

• DVB-t (Digital Video Broadcasting – Terrestrial)
• Coded Orthogonal Frequency Division Multiplexing (COFDM)
• QPSK (Quadrature Phase Shift Keying) 
• QAM (Quadrature Amplitude Modulation)
• MER (Modulation Error Ratio)
• FEC (Forward Error Correction)
• Guard Interval
• Carriers (2K & 8K)
• PID (Packet Identifier)
• LCN (Logical Channel Numbers)