[TenTec] Re: Orion IP2 numbers

[Jim Reid]

> Given that the spec for IP2 is +75dBm, I hope T-T will 
> take a look at what  caused this discrepancy -- and 
> whether it was an anomaly of the radio that ARRL had 
> for test, or whether it effects 'em all.

I thought the Orion Main rcvr did not receive much from
outside the amateur bands.  Here are the parameters of
the ARRL test and the reported data:

"Second-Order Intercept
Test Description: This test measures the amount of 2nd-order 

mixing that takes place in the receiver and calculates an

intercept of the second order response with the on-channel

 response. Signals at 6 and 8 MHz are presented to the 

receiver and the resultant output at 14 MHz is measured.

Test Results:

Frequency Preamplifier Mode IP2 (dBm) Notes

14.02 MHz.... Off........... CW.. +63.0... Main Receiver

14.02 MHz.... On...........  CW.. +63.0... Main Receiver

14.02 MHz... N/A............ CW... +43.1.. Sub Receiver

Note that the test signals input to the Main Rcvr for

the test are at 6 and 8 MHz!!  Frequencies to which the

main rcvr is alleged to be dear!!?  What is really going on

here and what does the test data mean???  Just some readings

on a Audio Voltmeter,  but what was really being read?



Inquiring minds are wondering about this..........



73,  Jim  KH7M