Use NAB test tape to calibrate IEC deck and vice versa

Use an NAB test
tape to calibrate an IEC deck 
 
 Play the NAB tape on the IEC deck. I am assuming a 15 ips
speed. 
 
 
 Play a 1K test tone on the deck and make that your zero
reference. 
 
 
 Play the 8K tone and adjust for -2.5dB relative to your 1K
tone. 
 
 
 Play the 50Hz tone on the tape and adjust for a +3 dB level if your
test tape has fringing compensation. If no fringing compensation, adjust
for +4 dB level. 
 
 or the opposite 
 
 Use 1K or 500Hz for your zero reference. 
 
 
 Play 8K tone and adjust for +2.5 dB 
 
 
 Play 50 tone and adjust for -3 dB (if your tape has fringing
compensation. If no FR, adjust for -2 dB) 
 (+2.7 dB for 10K)