7;m CE for, we moved
one back to its VHF analog channel on 2/17.
Hap Griffin
- Original Message -
From: John Gleichweit
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, March 07, 2009 11:11 AM
Subject: Re: [Repeater-Builder] How about a Freq list for the new DTV channels
The DTV mask specifications are tighter for digital than for analog for out of
channel noise. In fact, it takes a special setup to even measure it since
spectrum analyzers generally don't have the dynamic range to measure it
directly.
Hap Griffin WZ4O
VP - Engineering
SCETV
- Ori
The specifications for digital out of channel noise are tighter than for
analog. Also, digital is generally running less power than analog, so the
combination of the two should spell much LESS interference on 6m from a channel
2 digital transmitter.
Hap Griffin
VP - Engineering
SCETV
ately. While the pass
is fairly wide, the return loss frequency is very narrow and can be optimized
only if monitoring the RL as well as the throughput.
Hap Griffin
- Original Message -
From: v44kai
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, June 22, 2008 4:09 AM
Subjec
er for a MSR-2000 PL Module
> TRN5075A. Can anyone help?
>
> Hap Griffin
> WZ4O
>
. My eleven station network pays
over a half million $$$ in electrical costs per year. We expect it to be cut
to about one third of that after next year.
Hap Griffin
WZ4O
- Original Message -
From: MCH
To: Repeater-Builder@yahoogroups.com
Sent: Monday, January 07, 2008 6
ary
2009, all analog operation will cease and all of the digital stations will
be occulying only the channels 2 through 51. Thus, eighteen 6-MHz channels
will be freed up, or a total of 108 MHz.
Hap Griffin
WZ4O
and request your old vacated analog channel. They will have to
identify themselves as your actual digital channel number...completely
unrelated to their actual digital RF channel. Really smart of the FCC, eh?
Hap Griffin
WZ4O
- Original Message -
From: [EMAIL PROTECTED]
Not really...you can have the tuner do a scan of the available channels and
then they will show up as the "virtual" major channel...the same as the
associated analog channel...along with the minor channel multicast indicators.
Hap Griffin
WZ4O
- Original Message -
From:
- Original Message -
From: "mch" <[EMAIL PROTECTED]>
To:
Sent: Wednesday, December 21, 2005 5:43 PM
Subject: Re: [Repeater-Builder] hdtv radio shack ant
> And my reply was 'isn't directional better for ANYTHING?' (not just DTV)
>
> Joe M.
>
OK...I see what you meant now...yes,
tation is on VHF and the paired DTV
>> station is on UHF. For instance, I am the CE for an eleven station
>> network...most of our megewatt UHF analog stations are coverage matched
>> very
>> well by their 50 KW digital counterparts. The rule of thumb is that
>> average
&g
Yes...I believe that's what I said. Directional is better for DTV.
Hap Griffin
WZ4O
- Original Message -
From: "mch" <[EMAIL PROTECTED]>
To:
Sent: Wednesday, December 21, 2005 1:24 PM
Subject: Re: [Repeater-Builder] hdtv radio shack ant
> Wouldn&
of our megewatt UHF analog stations are coverage matched very
well by their 50 KW digital counterparts. The rule of thumb is that average
digital power is 12 dB less than peak analog power.
Hap Griffin
WZ4O
Yahoo! Groups Links
<*> To visit your group on the web, go to:
ht
path signals
better. Multipath is why indoor antenna reception of DTV is so touchy.
However, the later generations of tuner chipsets are getting much better at
multipath compensation.
Hap Griffin
VP-Engineering
SCETV
Yahoo! Groups Links
<*> To visit your group on the web, go to:
ing over why his RG-213
jumper wouldn't pass 12 GHz. I put it on a sweeper and showed him that
about 9.5 GHz, the losses shot up tremendously. That's why you always see
small coax on microwave equipment (or waveguide).
Hap Griffin
Yahoo! Groups Links
<*>
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